CN111945848A

CN111945848A - Jet device for sanitary ware

Info

Publication number: CN111945848A
Application number: CN202010413547.XA
Authority: CN
Inventors: W·库鲁; C·加雷尔斯; W·卡克; R·格拉斯坎普
Original assignee: Kohler Co
Current assignee: Kohler Co
Priority date: 2019-05-17
Filing date: 2020-05-15
Publication date: 2020-11-17
Anticipated expiration: 2040-05-15
Also published as: CN116005767A; US20230287671A1; US20200362548A1; CN111945848B; US11739517B2; EP3738676A1

Abstract

The toilet assembly includes a toilet body and a fluidic oscillator. The toilet body defines a toilet bowl configured to receive a volume of fluid therein. The jet oscillator is coupled to the toilet body in an edge region of the toilet bowl. The fluidic oscillator is positioned to direct fluid onto an interior surface of the toilet bowl. The fluidic oscillator is configured to continuously redirect the fluid flow to different locations along the inner surface of the toilet bowl.

Description

Jet device for sanitary ware

Cross reference to related patent applications

This application claims benefit and priority from U.S. provisional application No.62/849,522 filed on day 5/17 in 2019 and U.S. non-provisional application No.16/864,746 filed on day 5/1 in 2020, the entire contents of which are hereby incorporated by reference.

Background

The present disclosure generally relates to plumbing fixtures having water delivery functionality. More particularly, the present disclosure relates to the use of fluidic devices to improve the performance of sanitary fixtures.

Commercial and residential plumbing fixtures such as toilets, faucets, showers, whirlpools, and urinals rely on a continuous flow of water (e.g., steady flow, etc.) to perform work operations. For example, toilets rely on a continuous flow of water from the rim or catch basin of the toilet bowl to clean the surface of the toilet bowl and remove waste from the toilet bowl during flushing. Similarly, faucets and sprayers utilize a continuous stream of water to provide a cleaning action. However, continuous flow is not always effective in achieving the intended goals of the product. In the example of a toilet, the continuous flow may not be sufficient to remove all waste from the toilet bowl or to completely clean the surfaces of the toilet bowl. A greater volume of water or a more intense flow may be required to ensure that sufficient cleaning capacity is provided by the sanitary fixture.

Many sanitary fixtures also include valves for controlling multiple independent sprayers. These valves are used to coordinate the operation and timing of each of the injectors of the plumbing fixture. For example, a toilet may include a rim sprayer in the rim of a toilet bowl and a sump sprayer in the sump of the toilet bowl. The toilet may include an electronic valve that coordinates the release of water from the rim sprayer and the drip tank sprayer. At the beginning of a flush, water may be provided to the sump sprayer to remove water contained in the toilet bowl. After the water/waste has been removed from the toilet bowl, the electronic valve may switch so that water is provided to the rim sprayer. The water from the rim jet refills the toilet bowl and cleans the surface of the toilet bowl. Other applications may include electronic valves and control loops to perform other water delivery and timing functions. However, these electronic valves typically have many moving parts, and the valves and associated control circuits are expensive to manufacture.

Disclosure of Invention

One exemplary embodiment relates to a toilet assembly. The toilet assembly includes a toilet body and a fluidic oscillator. The toilet body defines a toilet bowl configured to receive a volume of fluid therein. The jet oscillator is coupled to the toilet body in an edge region of the toilet bowl. The fluidic oscillator is positioned to direct fluid onto an interior surface of the toilet bowl. The fluidic oscillator is configured to continuously redirect the fluid flow to different locations along the inner surface of the toilet.

Another exemplary embodiment relates to a toilet assembly. The toilet assembly includes a toilet body and a plurality of fluidic oscillators. The toilet body defines a toilet bowl configured to receive a volume of fluid therein. A plurality of fluidic oscillators are positioned to direct fluid onto an interior surface of a toilet bowl. The fluidic oscillators are fluidly connected to each other in an annular arrangement extending along the perimeter of the toilet bowl.

Yet another exemplary embodiment relates to a flushing system. The irrigation system includes a plurality of fluidic oscillators fluidly connected together in an annular arrangement. The plurality of fluidic oscillators are configured to be positioned within an edge region of a toilet bowl. The plurality of fluidic oscillators are configured to continuously redirect the fluid flow to different locations along the inner surface of the toilet bowl.

Drawings

FIG. 1 is a top perspective view of a line pressure toilet including a fluid control circuit according to an exemplary embodiment.

Fig. 2 is a side view of the line pressure toilet of fig. 1.

FIG. 3 is a top view of a fluid control circuit for a line pressure toilet according to an exemplary embodiment.

Fig. 4-7 are top views of the fluid control circuit of fig. 3 illustrating various operating states according to an exemplary embodiment.

Fig. 8A-8K are fluid control circuits that may be used in line pressure toilets according to various exemplary embodiments.

FIG. 9 is a side cross-sectional view of a line pressure toilet including a fluidic oscillator according to an exemplary embodiment.

Fig. 10 is a cross-sectional view of a fluidic oscillator according to an exemplary embodiment.

Fig. 11 is a cross-sectional view of a fluidic oscillator according to another exemplary embodiment.

Fig. 12A is a cross-sectional view of a fluid diverter according to an exemplary embodiment.

Fig. 12B is a cross-sectional view of a fluid diverter according to another exemplary embodiment.

FIG. 13 is a cross-sectional view of a fluid diverter according to another exemplary embodiment.

Fig. 14-16 are cross-sectional views of the fluid diverter of fig. 13 illustrating various operating conditions according to an exemplary embodiment.

Fig. 17A is a flow schematic of a fluidic switching device according to an exemplary embodiment.

Fig. 17B is a flow diagram of a fluidic switching device according to another exemplary embodiment.

Fig. 18 is a perspective view of a fluidic switching device according to an exemplary embodiment.

Fig. 19 is a top cross-sectional view of the base portion of the fluidic switching device of fig. 18.

Fig. 20 is a flow schematic of a fluidic switching device according to another exemplary embodiment.

Fig. 21 is a flow schematic of a fluidic switching device according to another exemplary embodiment.

Fig. 22 is a flow schematic of a fluidic switching device according to another exemplary embodiment.

Fig. 23 is a flow schematic of a fluidic switching device according to another exemplary embodiment.

Fig. 24 is a chain jet switching assembly implementing the flow schematic of fig. 23.

FIG. 25 is a whirlpool toilet assembly according to an exemplary embodiment.

FIG. 26 is a quick fill toilet assembly according to an exemplary embodiment.

Fig. 27 is a chemical dispensing system according to an example embodiment.

Fig. 28 is a top view of a jet switch device with a drain according to an exemplary embodiment.

Fig. 29 is a perspective view of a water discharge valve for a jet flow switching device according to an exemplary embodiment.

Fig. 30 is a side cross-sectional view of the drain valve portion of the fluidic switching device of fig. 28 in a first operational state.

Fig. 31 is a side cross-sectional view of the drain valve portion of the fluidic switching device of fig. 28 in a second operational state.

FIG. 32 is a top view of a jet switch device with a drain in accordance with another exemplary embodiment.

Fig. 33 is a side cross-sectional view of the drain valve portion of the fluidic switching device of fig. 32 in a first operational state.

Fig. 34 is a side cross-sectional view of the drain valve portion of the fluidic switching device of fig. 32 in a second operational state.

Fig. 35 is a top cross-sectional view of a jet switch device with a drain in accordance with another exemplary embodiment.

Fig. 36 is a perspective view of a capacitor assembly according to an exemplary embodiment.

Fig. 37 is a cross-sectional view of a fluidic oscillator according to another exemplary embodiment.

Fig. 38A is a cross-sectional view of a fluidic oscillator according to another exemplary embodiment.

Fig. 38B is a cross-sectional view of the fluidic oscillator of fig. 38A during operation.

Fig. 39A is a perspective view of a fluidic oscillator according to another exemplary embodiment.

Fig. 39B is a top view of the fluidic oscillator of fig. 39A.

Fig. 39C is a side cross-sectional view of the fluidic oscillator of fig. 39A.

FIG. 40 is a side cross-sectional view of a line pressure toilet including fluidic oscillators arranged in series, according to an exemplary embodiment.

FIG. 41 is a cross-sectional view of a fluidic oscillator including two different outlet nozzle configurations according to an exemplary embodiment.

Fig. 42 is a perspective view of a single fluidic oscillator according to an exemplary embodiment.

Fig. 43 is a perspective view of a dual fluidic oscillator according to an exemplary embodiment.

FIG. 44 is a side cross-sectional view of a toilet including a fluidic oscillator according to an exemplary embodiment.

FIG. 45 is a side cross-sectional view of a toilet including a fluidic oscillator according to another exemplary embodiment.

Fig. 46 is a cross-sectional view of a fluidic oscillator according to another exemplary embodiment.

Fig. 47 is a cross-sectional view of a fluidic oscillator according to another exemplary embodiment.

Fig. 48 is a perspective view of the fluidic oscillator of fig. 47.

FIG. 49 is a perspective view of a toilet assembly with an oscillating rim sprayer system according to an exemplary embodiment.

Fig. 50A is a schematic diagram of a flush system for a toilet, according to an exemplary embodiment.

Fig. 50B is a prototype of the irrigation system of fig. 50A.

Fig. 51 is a perspective view of a urinal including a fluidic oscillator according to an exemplary embodiment.

Fig. 52 is a perspective view of a urinal including a fluidic oscillator according to another exemplary embodiment.

Fig. 53 is a perspective view of a fluidic oscillator for the urinal of fig. 52, according to an exemplary embodiment.

Fig. 54 is a perspective view of a fluidic oscillator for the urinal of fig. 52, according to another exemplary embodiment.

FIG. 55 is a perspective view of a bathtub including a plurality of fluidic oscillators according to an exemplary embodiment.

Fig. 56 is a side view of a shower including a plurality of fluidic oscillators according to an exemplary embodiment.

FIG. 57 is a side cross-sectional view of a toilet including a fluidic oscillator according to an exemplary embodiment.

FIG. 58 is a side cross-sectional view of a toilet including a fluidic oscillator according to another exemplary embodiment.

FIG. 59 is a side cross-sectional view of a fluidic oscillator coupled to a sump sprayer of a toilet according to an exemplary embodiment.

Fig. 60 is a side cross-sectional view of a fluidic oscillator according to another exemplary embodiment.

Fig. 61 is a side cross-sectional view of a fluidic oscillator according to another exemplary embodiment.

Fig. 62-67 are side cross-sectional views of different types of fluidic oscillators in operation, according to various exemplary embodiments.

FIG. 68 is a side cross-sectional view of a toilet including a fluid diverter, according to an exemplary embodiment.

Fig. 69-70 are perspective views of the fluid diverter of fig. 68 in various operating states according to various exemplary embodiments.

FIG. 71 is a side cross-sectional view of a fluidic oscillator for a showerhead according to an exemplary embodiment.

FIG. 72 is a side cross-sectional view of a fluidic oscillator for a showerhead according to another exemplary embodiment.

Fig. 73 is a side cross-sectional view of a fluidic oscillator for multiple showerheads according to an exemplary embodiment.

Fig. 74 is a side cross-sectional view of a plurality of interconnected fluidic oscillators for a plurality of showerheads according to an exemplary embodiment.

Fig. 75 is a perspective view of a showerhead including circumferentially oriented jets according to an exemplary embodiment.

Fig. 76 is a side cross-sectional view of a showerhead configured to generate micro-bubbles according to an exemplary embodiment.

FIG. 77 is a schematic view of a chain jet assembly for a whirlpool according to an exemplary embodiment.

Fig. 78 is a cross-sectional view of a fluidic device configured to generate microbubbles, according to an example embodiment.

Fig. 79-82 are illustrations of microbubble formation from an opening connected to a fluidic oscillator, according to various exemplary embodiments.

Fig. 83 to 84 are illustrations of micro-bubbles in water according to various exemplary embodiments.

Fig. 85 is a side cross-sectional view of a fluidic oscillator for a faucet according to an exemplary embodiment.

Fig. 86 to 87 are perspective views of a fluidic oscillator for a faucet according to another exemplary embodiment.

Fig. 88 is a perspective view of a fluidic oscillator for a faucet according to another exemplary embodiment.

Fig. 89 is an exploded perspective view of the fluidic oscillator of fig. 88 according to an exemplary embodiment.

Fig. 90 is a cross-sectional view of the fluidic oscillator of fig. 88, according to an exemplary embodiment.

Fig. 91 is a cross-sectional view of a fluidic device configured to generate microbubbles, according to another exemplary embodiment.

Fig. 92 is a cross-sectional view of the fluidic device of fig. 91 during normal operation according to an exemplary embodiment.

FIG. 93 is a perspective cross-sectional view of a pumping device according to an exemplary embodiment.

FIG. 94 is a side cross-sectional view of a piezoelectric element in various operating states according to an exemplary embodiment.

FIG. 95 is a side cross-sectional view of a single piezoelectric element illustrating displacement of the piezoelectric element, according to an exemplary embodiment.

Fig. 96 is a side cross-sectional view of a stack of piezoelectric elements illustrating displacement of the stack, according to an example embodiment.

Fig. 97 is a perspective cross-sectional view of the pumping device of fig. 93 in a first operating state.

Fig. 98 is a perspective cross-sectional view of the pumping device of fig. 93 in a second operational state.

FIG. 99 is a side cross-sectional view of a pumping device according to another exemplary embodiment.

Fig. 100-102 are side cross-sectional views of the pumping device of fig. 99 in various operating states.

Fig. 103A-103D are images illustrating different flow structures produced by a pumping device, according to an exemplary embodiment.

Detailed Description

Referring generally to the drawings, a plumbing fixture includes one or more fluidic devices or structures configured to control the flow of water through one or more sprayers (e.g., fluid outlets, outlet openings, etc.) of the plumbing fixture. The sanitary fixture may be a sanitary fixture used in a building such as a toilet, a faucet, a shower head, a hand sprayer, a bathtub, and the like. The fluidic devices include interconnected flow channels (e.g., passageways, etc.) that include geometries that can be varied to selectively control the flow of water emitted from the fluidic devices. For example, the channels may be configured to provide a pulsating or oscillating flow of water to achieve improved water delivery performance through the plumbing fixture, which advantageously increases the cleaning ability of the plumbing fixture. Alternatively or in combination, the fluidic device may be configured to control the timing of flow through one or more ejectors.

One embodiment of the present disclosure is directed to a plumbing fixture. The plumbing fixture includes a fluidic oscillator configured to switch water flow between or pulse water flow to the sprayers and a plurality of sprayers.

In some embodiments, a fluidic oscillator includes an inlet channel, an outlet channel, and a resonating chamber. In some embodiments, the plumbing fixture includes an actuator configured to change a volume of the resonant chamber.

In some embodiments, the plumbing fixture includes a plurality of fluidic oscillators. In some embodiments, a first fluidic oscillator of the plurality of fluidic oscillators is arranged in a series flow arrangement with a second fluidic oscillator of the plurality of fluidic oscillators.

In some embodiments, the plumbing fixture includes a toilet including a toilet bowl, a rim sprayer disposed in a rim region of the toilet bowl, and a sump sprayer disposed in a sump of the toilet bowl. The toilet also includes a first fluidic oscillator. The first leg of the first fluidic oscillator is fluidly coupled to the edge sprayer. The second leg of the first fluidic oscillator is fluidly coupled to the sump sprayer. In some embodiments, at least one branch of the first fluidic oscillator is fluidly coupled to the second fluidic oscillator.

In some embodiments, the plumbing fixture includes a showerhead including a plurality of first sprayers and a plurality of second sprayers. In some embodiments, the plurality of second injectors circumferentially surrounds the plurality of first injectors. In some embodiments, the sprayer comprises a plurality of showerheads.

In some embodiments, the sanitary fixture comprises a bathtub including a plurality of vortex finders. Each swirl ejector includes an upper stage fluidic oscillator fluidly coupled to a lower stage fluidic oscillator. In some embodiments, the operating frequency of the upper stage fluidic oscillator is lower than the operating frequency of the lower stage fluidic oscillator.

In some embodiments, the plumbing fixture includes a bathtub. The plurality of sprayers comprise a porous material below the water line of the tub. The fluidic oscillator is configured to provide a pulsating air flow through a first outlet channel of the fluidic oscillator. The first outlet channel of the fluidic oscillator is fluidly coupled to the porous material.

In some embodiments, the plumbing fixture includes a faucet including a nozzle insert having a fluidic oscillator disposed thereon.

Another embodiment of the present disclosure is directed to a plumbing fixture. The plumbing fixture includes a fluid control circuit configured to control operation and timing of the sprayers and a plurality of sprayers. The fluid control circuit includes a fluidic device including at least one of a flow restrictor and a fluidic oscillator.

In some embodiments, the sanitary fixture comprises a toilet, the toilet comprising a toilet bowl. In some embodiments, the jet includes at least two of a sump jet located in a sump of the toilet bowl, a flush jet located in a trapway of the toilet, and a rim jet located in a rim region of the toilet bowl.

Another embodiment of the present disclosure is directed to a plumbing fixture. The plumbing fixture includes a fluidic oscillator including an inlet channel, a resonating chamber fluidly coupled to the inlet channel, an outlet channel fluidly coupled to the inlet channel, and an output chamber fluidly coupled to the output channel. The fluidic oscillator includes an outlet opening disposed on the outlet chamber. The cross-sectional area of the outlet opening is smaller than the cross-sectional area of the outlet chamber.

In some embodiments, the sanitary fixture comprises a bathtub including a vortex finder. The fluidic device is at least partially disposed in the injector passage of the swirl injector.

Another embodiment of the present disclosure is directed to a toilet that includes a toilet bowl and a sump located at a base of the toilet bowl. The toilet includes a sump sprayer disposed in the sump and configured to provide water to the sump. The toilet also includes a fluidic device fluidly coupled to the sump sprayer. In some embodiments, the fluidic device is a fluidic oscillator configured to generate a particular flow.

Another embodiment of the present disclosure is directed to a plumbing fixture. The plumbing fixture includes a fluid diverter. The fluid diverter includes an input channel, a first output channel, a second output channel, and a plurality of control ports. The input channel is fluidly coupled to one of the first output channel and the second output channel by pulsing flow through one of the plurality of control ports.

Another embodiment of the present disclosure is directed to a plumbing fixture. The plumbing fixture includes a fluidic oscillator that includes an input channel, a first output channel, a second output channel, and a resonating chamber. The plumbing fixture includes a venturi fluidly coupled to at least one of the first output passage and the second output passage.

In some embodiments, the plumbing fixture includes a showerhead including a plurality of jets and a plurality of venturis. Each injector of the showerhead is fluidly coupled to one of the first and second output channels and to a corresponding one of the plurality of venturi tubes.

According to an exemplary embodiment, the sanitary fixture comprises a toilet bowl comprising a fluidic oscillator. The toilet may be an in-line pressure toilet or a gravity-fed siphonic toilet. The toilet includes a toilet bowl including a rim area along an upper perimeter of the toilet bowl and a catch basin at a base of the toilet bowl. The toilet includes at least one of a rim sprayer disposed in a rim area of the toilet and a sump sprayer disposed in a sump of the toilet. A fluidic oscillator is fluidly coupled to each of the rim sprayer and the sump sprayer, and the fluidic oscillator is configured to coordinate the release of water through each sprayer during a flush cycle. More specifically, the fluidic oscillator is configured to rapidly switch flow between the edge jet and the sump jet. Among other benefits, the fluidic oscillator reduces flow losses compared to toilets in which a continuous water flow is evenly split between the rim sprayer and the sump sprayer. In some embodiments, the toilet includes a plurality of fluidic oscillators coupled together (e.g., arranged in a series and/or parallel flow arrangement).

According to an exemplary embodiment, a toilet includes a jet diverter valve that controls the flow of water from an inlet channel (e.g., branch, passage, etc.) of the jet diverter valve to one of two outlet channels in the jet diverter valve. The direction of flow exiting the inlet passage to one of the two outlet passages may be controlled by pulsing the flow through one of the two control ports of the fluidic diverter valve.

According to an exemplary embodiment, the toilet includes a fluid control circuit configured to control the operational sequence of each of the rim sprayer and the drip tank sprayer. The fluid control circuit includes a plurality of interconnected fluidic devices. The fluidic control circuit may include a fluidic oscillator configured to switch fluid flow direction between two or more channels and/or fluidic diverter valves. Alternatively or in combination, the fluid control circuit may include a flow restrictor configured to delay delivery of water to different portions of the fluid control circuit (e.g., to one or more openings and/or passages within the fluid control circuit, etc.). The fluid control circuit may include a combination of curved and straight walls, and the fluid control circuit utilizes the coanda effect (e.g., the tendency of fluid to remain attached to a curved or convex surface) to facilitate flow switching between channels of the fluid control circuit. Among other benefits, the fluid control circuit does not include moving parts and eliminates the need for complex flow switching valves to control the sprayers in the toilet during a flush cycle.

According to an exemplary embodiment, the toilet includes a trapway fluidly coupling a sump to a drain of the toilet. The toilet also includes a prime injector disposed in the up leg of the trapway. The fluid control circuit may be configured to coordinate the operation of the irrigation and sump sprayers during a flush cycle, which advantageously reduces the amount of water required to trigger a siphon and improves the waste removal performance of the toilet.

Fluidic oscillators may also be used within plumbing fixtures to create special jets (e.g., flow structures created by pulsed jets, etc.). For example, the fluidic oscillator may be configured to produce an annular ejector or other ejector type that produces greater momentum and material removal performance for the same mass flux of water than a continuous flow ejector (e.g., an ejector configured to emit a continuous stream of water). Because of its effectiveness, a particular eductor requires less fluid to operate, which minimizes the audible noise generated by the eductor. The fluidic oscillator may be at least partially disposed within the inlet conduit upstream of the sump sprayer, or integrally formed with the sump sprayer, in order to improve waste removal performance during a flush cycle (e.g., removing adhered waste from the surface of the sump, trapway, etc.).

According to an exemplary embodiment, the fluidic devices of the present disclosure are machined, molded, or otherwise formed into fluidic valve bodies (e.g., modular inserts). The jet valve body may be removably coupled to the toilet or suspended within the internal cavity of the toilet to improve the aesthetics of the toilet. The jet valve body may be fluidly coupled to one or more eductors using a hose. Alternatively, the fluidic device can be at least partially molded (e.g., cast, etc.) into the toilet from one or more pieces of vitreous clay.

The fluidic devices of the present disclosure may also be incorporated into various other sanitary appliances to improve cleaning performance, reduce water consumption, and/or improve the overall user experience. According to an exemplary embodiment, a plumbing fixture includes a showerhead having a plurality of sprayers. Each jet of the showerhead includes a venturi fluidly coupled to a fluidic oscillator. A pulsating water flow is provided to each eductor by a fluidic oscillator, which causes air to be injected into the fluid flow by the venturi. "bubbles" of air are injected into the flow as the water pulses through the venturi, breaking up the flow into discrete packets (e.g., droplets, etc.) that are ejected from the ejector. Among other benefits, injecting these discrete air packets into the flow stream minimizes water consumption while maintaining a perception of continuous flow through the ejector.

According to an exemplary embodiment, a fluidic oscillator for a showerhead includes a resonant chamber having a volume that sets the frequency of flow pulses from each jet. The showerhead includes an actuator that can be used to vary the volume of the resonant chamber and thereby vary the frequency of the flow pulses according to user preference. For example, the frequency of the flow pulses may be adjusted to improve the cleaning ability of the showerhead or to give the user a perception of continuous flow of water by increasing the frequency of the flow pulses.

According to an exemplary embodiment, the plumbing fixture is a bathtub (e.g., whirlpool bathtub, etc.). The bathtub includes a plurality of vortex finders. Similar to toilet applications, each jet of the tub may be fluidly coupled to a fluidic oscillator or a plurality of fluidic oscillators (e.g., arranged in a series and/or parallel flow configuration). The frequency of the water pulses provided by the jets may be dynamically controlled using an actuator, as described with reference to the showerhead application. The fluidic oscillator may also be configured to produce a special flow jet (e.g., ring jet, etc.), as described with reference to a sump jet for toilet applications. The particular injector, such as an annular injector, may improve flow penetration into a volume of water relative to an injector that produces a continuous flow of water, among other benefits.

According to an exemplary embodiment, the bathtub comprises a fluidic oscillator configured to generate micro-bubbles within the bathtub. The bathtub includes a porous material located below the water line (e.g., fill line, etc.) of the bathtub. The inlet of the fluidic oscillator is fluidly coupled to an air source (e.g., the environment surrounding the bathtub). The outlet channel (e.g., branch, passageway, etc.) of the fluidic oscillator is fluidly coupled to the porous material. The fluidic oscillator jets a pulse of air through the porous material to create small bubbles in the tub fill. Fluidic oscillators are capable of generating billions of bubbles of various sizes per second, depending on their geometry and the geometry of the porous material. Among other benefits, the creation of air bubbles without the use of perforations or holes in the wall of the bathtub advantageously reduces the amount of work required to clean and maintain the bathtub between uses.

According to an exemplary embodiment, the plumbing fixture includes a faucet (e.g., a kitchen or bathroom faucet) that includes a fluidic oscillator disposed thereon. The fluidic oscillator may be included as part of a nozzle insert (e.g., channels, passages, etc. of the fluidic oscillator may be machined or otherwise formed onto a surface of the insert) that may be retrofitted onto existing water faucets to reduce water consumption and improve the cleaning capabilities of the faucet.

In any of the above embodiments, the fluidic oscillator may be coupled to one or more surfaces of the plumbing fixture to improve flow distribution and cleaning of the plumbing fixture. The fluidic oscillator may be configured to continuously change the flow direction of the water exiting the jet to more evenly distribute the water over the surface of the plumbing fixture (e.g., the interior surface of a toilet bowl, the shower wall, the interior wall of a bathtub, the sink basin, etc.). The fluidic oscillator can be coupled to a pulsating flow fluidic oscillator to improve its cleaning ability for a fixed flow of water. These and other advantageous features will become apparent to those reading the present disclosure and the accompanying drawings.

Toilet bowl

Referring to fig. 1-2, a line pressure toilet 100 is shown according to an exemplary embodiment. The line pressure toilet 100 includes a toilet body 102. As shown in fig. 1, the toilet body 102 is a tankless toilet configured to receive water from a water supply conduit 104. The water supply conduit 104 may be a water supply line within a home, a commercial property, or another type of building. The water supply conduit 104 may be configured to supply water at municipal water pressure or well pump pressure. The water supply conduit 104 may be a pipe, tube, or other water delivery mechanism extending from a wall of the building. As shown in fig. 1-2, the toilet body 102 includes a toilet bowl 106. Toilet bowl 106 includes a surface 108 (e.g., an interior surface, etc.) that defines a cavity into which solid waste or liquid waste may be deposited. Toilet bowl 106 includes a rim 112 near an upper rim of toilet bowl 106. Rim 112 may extend inward from the outer rim of toilet bowl 106. In some embodiments, the toilet body 102 is made (e.g., cast or otherwise formed) from a single piece of vitreous material, such as clay. The toilet body 102 may include one or more openings (e.g., slots, holes, etc.) configured to receive trim pieces, tubes, and/or other components/hardware to facilitate operation of the line pressure toilet 100.

As shown in fig. 1-2, the toilet 100 includes a water collection tank 114 disposed at a base (e.g., lower end, etc.) of the toilet bowl 106. The toilet 100 also includes a trapway 116 (e.g., siphon, etc.), which trapway 116 extends between the water collection tank 114 of the toilet 100 and the drain 117 and fluidly couples the water collection tank 114 to the drain 117. The toilet 100 also includes a plurality of sprayers configured to facilitate a flushing operation of the toilet 100, including a rim sprayer 118 disposed proximate the rim 112 of the toilet bowl 106, a sump sprayer 120 disposed proximate the sump 114 of the toilet bowl 106, and a flush sprayer 122 disposed in the upward leg of the trapway 116. Rim jet 118 is configured to distribute water from rim 112 into toilet bowl 106 along surface 108 (e.g., interior surface, etc.) of toilet bowl 116. The rim jet 118 cleans the surface 108 and refills the toilet bowl 106 with water at the end of the flush. The sump sprayer 120 is configured to distribute water from a forward wall of the sump 114 toward the trapway 116. In some embodiments, the sump sprayer 120 may be used to trigger (e.g., initiate, etc.) siphoning by pushing water out of the upward leg through the trapway 116. In other embodiments, operation of sump sprayer 120 is enhanced by irrigation sprayer 122. Similar to sump sprayer 120, a prime sprayer 122 is oriented within trapway 116 and is configured to push water along the upward leg of trapway 116 (e.g., through trapway 116 toward drain 117). According to an exemplary embodiment, toilet 100 is configured to coordinate the operation of water catch basin eductor 120 and prime eductor 122 to improve the momentum transfer of water from toilet bowl 106 through the upward leg of trapway 116, thereby improving waste removal (e.g., removing skid marks and other waste from toilet bowl 106) and minimizing water consumption during flushing.

As shown in fig. 1-2, line pressure toilet 100 includes a fluid control circuit 200, which fluid control circuit 200 is configured to drive two or more sprayers, such as rim sprayer 118, sump sprayer 120, and irrigation sprayer 122. The fluid control circuit 200 includes a fluidic device configured to control the actuation and timing of the injector. According to an exemplary embodiment, the fluid control circuit 200 is coupled to the toilet 100 below an upper surface of the toilet 100 between the toilet bowl 106 and a rear wall of the toilet 100 (e.g., a mounting surface of the toilet configured to engage a wall in a building). In other embodiments, the placement of the fluid control circuit 200 may be different. As shown in fig. 1-2, the fluid control circuit 200 is disposed above the water line of the toilet bowl 106 to allow water to drain from the fluid control circuit 200 between flushes. As shown in fig. 1, the fluid control circuit 200 is at least partially disposed within an inlet channel of the toilet 100 and extends between the inlet channel of the toilet 100 and the flow control manifold 124 of the toilet 100. The flow control manifold 124 is configured to selectively couple each outlet (e.g., the first outlet 202, the second outlet 204, and the third outlet 206) of the flow control circuit 200 to a corresponding one of the injectors. In some embodiments, the flow control circuit 200 is integrally formed with the toilet body 102 (e.g., formed from vitreous clay, etc.). In other embodiments, the flow control circuit 200 is machined, molded, or otherwise formed as a jet valve body that is removably (e.g., removably) coupled to the toilet body 102.

The flow control circuit 200 may be made from a variety of materials including plastic, metal, and the like. The jet valve body may be fluidly coupled to the inlet passage and injectors (e.g., edge injectors 118, sump injectors 120, and pour injectors 122) by using hoses, tubes, or other flow conduits. Among other benefits, the use of a removable fluidic valve body simplifies replacement of the fluid control circuit 200 during a maintenance event. The jet valve body can also be used to retrofit complex and expensive electronic valve assemblies used in existing toilets.

The fluidic device includes at least one of a fluidic oscillator configured to switch flow between two different flow channels (e.g., bistable fluidic oscillators) or in a flow direction (e.g., monostable fluidic oscillators) and a flow restrictor configured to control timing of flow delivery to one or more channels or openings of the fluid control circuit 200. As shown in fig. 1-2, the fluid control circuit 200 includes an inlet 208, a first outlet 202, a second outlet 204, and a third outlet 206. In other embodiments, the fluid control circuit 200 may include additional or fewer inlet/outlet passages. According to an exemplary embodiment, a first outlet 202 of fluid control circuit 200 is fluidly coupled to sump sprayer 120, a second outlet 204 of fluid control circuit 200 is fluidly coupled to edge sprayer 118, and a third outlet 206 of fluid control circuit 200 is fluidly coupled to irrigation sprayer 122.

The fluid control circuit 200 uses the coanda effect (e.g., the tendency of fluid to remain attached to a curved or convex surface) to facilitate flow switching between the outlets of the fluid control circuit 200. Among other benefits, the geometry of the channels in the fluid control circuit 200 allows timing and switching functions to be performed without moving parts and without a power source. Fig. 3 shows a cross-section through a fluid control circuit 200 according to an exemplary embodiment. As shown in fig. 3, the fluid control circuit 200 includes a plurality of flow restrictors, namely, a first flow restrictor 210 and a second flow restrictor 214, wherein the first flow restrictor 210 is disposed upstream of where the first outlet 202 is separated from the second outlet 204, and the second flow restrictor 214 is disposed upstream of where the first intermediate passage 212 is separated from the third outlet 206. In the embodiment of fig. 3, a first restrictor 210 fluidly couples inlet 208 to a first intermediate passage 212, while a second restrictor 214 fluidly couples inlet 208 to a second intermediate passage 216. In other embodiments, the number and/or arrangement of flow restrictors may be different. The geometry of the intermediate passage upstream of the discharge end of each flow restrictor causes water to preferentially flow to only one of the three outlets.

According to an exemplary embodiment, the flow restrictors (e.g., first flow restrictor 210 and second flow restrictor 214) include a series of serpentine channels that restrict flow. The pressure drop through the flow restrictor is greater than the pressure drop through any of the intermediate passages (e.g., first intermediate passage 212 and second intermediate passage 216). The difference in pressure drop causes a time delay in the flow that can be tuned or adjusted by changing the geometry and length of the flow restrictor.

Fig. 4-7 illustrate operation of the fluid control circuit 200 during flushing according to an exemplary embodiment. As shown in fig. 4, water introduced through inlet 208 is separated in three different directions by both the flow restrictor and the second intermediate passage 216. According to an exemplary embodiment, water is delivered from the inlet passage to the inlet 208 through a valve or fluid actuator that is triggered by a user (e.g., in response to manipulation of a flush lever or button). The valve or actuator remains open throughout the flush cycle (e.g., 30 s). In some embodiments, the toilet 100 includes a restrictor (e.g., a throttle valve, etc.) between the inlet passage and the fluid control circuit 200 to ensure that a consistent water delivery pressure is provided to the fluid control circuit 200 regardless of where the toilet 100 is installed.

As shown in fig. 4, the water continues along the curved portion (e.g., convex wall) of second intermediate passage 216 through second intermediate passage 216 to third outlet 206 and, correspondingly, to irrigation emitter 122. This operation continues until a siphon is triggered (e.g., 1-2 seconds). As shown in fig. 5, second restrictor 214 is sized to vent flow into second intermediate passage 216 once siphoning has been initiated. As shown in fig. 6, water exiting second restrictor 214 separates the flow from the convex wall of second intermediate passage 216, which redirects the flow from third outlet 206 to first intermediate passage 212.

As shown in fig. 6, water entering first intermediate passage 212 is directed along the curved portion of first intermediate passage 212 to first outlet 202 and correspondingly to sump sprayer 120. Water continues to flow through the first outlet 202 and the sump sprayer 120 until the siphon breaks (e.g., an additional 5-6 seconds) when most of the water has been removed from the toilet bowl 106. As shown in fig. 6, the first restrictor 210 is sized to coordinate the discharge of flow into the first intermediate passage 212 with siphon breaks. As shown in fig. 7, water exiting the first flow restrictor 210 redirects the flow from the first outlet 202 to the second outlet 204 and into the edge jet 118. The fluid control circuit 200 continues to deliver water to the rim sprayer 118 and the toilet bowl 106 until the flush cycle is complete (e.g., 30 seconds or until the toilet bowl 106 has been refilled in preparation for the next flush cycle).

The number, type, and arrangement of fluidic devices within the fluid control circuit 200 of fig. 3 should not be considered limiting. Alternatives are possible without departing from the inventive concept described herein. For example, fig. 8A shows a fluid control circuit 300 that includes a fluidic oscillator configured to continuously switch water flow between two of three outlets, shown as a first outlet 302, a second outlet 304, and a third outlet 306, throughout a flush cycle. As shown in fig. 8, a first outlet 302 of fluid control circuit 300 is coupled to sump sprayer 120, a second outlet 304 of fluid control circuit 300 is coupled to irrigation sprayer 122, and a third outlet of fluid control circuit 300 is coupled to edge sprayer 118. The fluidic oscillator includes a pair of resonating chambers, shown as a first resonating chamber 310 and a second resonating chamber 312 (e.g., a cavity, a feedback tube, etc.), the first resonating chamber 310 and the second resonating chamber 312 fluidly coupled to a first intermediate channel 314 of the fluid control circuit 300.

As shown in fig. 8A, fluid received at the inlet 308 of the fluid control circuit 300 enters the first intermediate passage 314 and the flow restrictor 316 once activated. The fluidic oscillator periodically switches flow (e.g., back and forth) between the first outlet 302 and a second intermediate channel 318, the second intermediate channel 318 further coupled to the second outlet 304 and the third outlet 306 of the fluid control circuit 300. During a period of time after startup (e.g., just after water has been introduced to fluid control circuit 300 through inlet 308), water is released from each of sump sprayer 120 and irrigation sprayer 122 in alternating pulses. The amount of water released during each pulse varies depending on the geometry of the flow channels in the fluid control circuit 300. Coordinating the release of water between the sump sprayer 120 and the pour sprayer 122 improves the momentum transfer of the water through the trapway 116, which improves the removal of waste from the toilet bowl 106 during a flush cycle, among other benefits. In addition, the pulsating water flow through each jet (e.g., sump jet 120 and fill jet 122) may be used to drive a particular jet structure, which improves the removal of bulk material from the surface of the toilet while also minimizing water consumption and noise. Various special injectors (e.g., flow structures, etc.) may be created using fluidic oscillators, as will be described in more detail with reference to fig. 31-42.

Still referring to fig. 8A, the operating frequency (e.g., switching frequency, etc.) of the fluidic oscillator is determined based in part on the volumes of the first 310 and second 312 resonating chambers of the fluidic oscillator. In some embodiments, the frequency may vary in a range between about 0.5Hz to 100 Hz. According to an exemplary embodiment, toilet 100 includes an actuator (not shown) configured to vary the volume of each chamber and thereby control the operating frequency. The actuators may be adjusted to maximize flushing performance (e.g., improve waste removal performance, minimize water consumption, and/or reduce acoustic noise generated by edge sprayers 118, sump sprayers 120, and irrigation sprayers 122). In some embodiments, the actuator may be a rod coupled to a wall of the chamber, which may be manually manipulated to change the position of the wall. In other embodiments, the actuator may be a switch or valve configured to fluidly couple the first and

second chambers

310, 312 of different volumes (e.g., closed tubes having different lengths, etc.). In other embodiments, the actuator may be some other chamber volume adjustment mechanism.

As shown in fig. 8A, the flow restrictor 316 is configured to redirect flow from the second outlet 304 (e.g., the irrigation emitter 122) to the third outlet 306 (e.g., the edge emitter 118) after a given period of time has elapsed. For example, the flow restrictor 316 may be sized to redirect flow to the edge jet 118 at or just before or after a siphon break. The sump sprayer 120 and rim sprayer 118 continue to operate until the toilet bowl 106 is refilled. The number, type, and arrangement of fluidic devices within fluid control circuit 300 may be modified as needed to cause a desired operational sequence of edge sprayers 118, sump sprayers 120, and irrigation sprayers 122 (e.g., to modify activation/deactivation times, etc.).

Fig. 8B-8I show various additional examples of fluid control circuits that may be used to divert flow to one or more sprayers within the toilet. Fig. 8B illustrates a fluid control loop 320, the fluid control loop 320 including two monostable fluidic oscillators in series, namely a first monostable fluidic oscillator 322 and a second monostable fluidic oscillator 324, the second monostable fluidic oscillator 324 configured to receive flow from a first branch 326 of the first monostable fluidic oscillator 322. Fig. 8C shows a fluid control device 328, the fluid control device 328 comprising a monostable fluidic oscillator similar to that of fig. 8B, in series with a bistable fluidic oscillator 330. Fig. 8D shows a fluid control circuit 332 that includes a fluid capacitor 334. The fluid capacitor 334 provides timing control of the release of fluid through one of two outlet passages, shown as an upper passage 336 and a lower passage 338. In some embodiments, the upper passageway 336 is coupled to a sump sprayer of the toilet and the lower passageway 338 is coupled to a rim sprayer of the toilet. In other embodiments, the arrangement of the

passages

336, 338 may be different. The flow received through the inlet 340 of the fluid control circuit 332 (via the coanda effect) is directed to both the fluid capacitor 334 and the upper flow path 336. A port 342 along the upper surface of the fluid capacitor 334 fluidly connects the capacitor with a control port 344 of the fluid control circuit 332. Once the fluid capacitor 334 is filled with fluid, the fluid is redirected to the control port 344 to redirect the flow through the lower passageway 338 (e.g., toward the edge shooter). In the exemplary embodiment of fig. 8D, the fluid capacitor 334 is a closed hollow cylinder. In various exemplary embodiments, the size and/or shape of the fluid capacitor 334 may vary depending on the desired flow characteristics (e.g., switching time) of the fluid control circuit 332.

Fig. 8E shows a fluid control circuit 346 similar to the fluid control circuit 332 of fig. 8D. The fluid control loop 346 of fig. 8E includes two monostable fluidic oscillators in series. Providing parallel flow with both the upper stage fluidic oscillator 348 and the lower stage fluidic oscillator 350 downstream of the upper stage fluidic oscillator 348. Initially, the superior fluidic oscillator 348 diverts flow to a fluid capacitor 352. Once the fluid capacitor 352 is filled, fluid from the fluid capacitor 352 is directed to a control port 354 on the upper stage fluidic oscillator 348. A change in flow direction through the upper stage fluidic oscillator 348 results in a change in flow direction through the lower stage fluidic oscillator 350 (e.g., redirecting flow from a to B as shown in fig. 8E). Fig. 8F shows a more compact form of the fluid control circuit 346 of fig. 8E. Fluid control circuit 346 is folded in two layers to fluidly couple (e.g., connect) the inlets of each of fluidic oscillator 348 and fluidic oscillator 350.

Fig. 8G shows a fluid control circuit 356 that includes multiple fluid capacitors for switching the flow direction back and forth between the two outlets (e.g., from a to B to a as shown in fig. 8G). The plurality of fluid capacitors includes a first fluid capacitor 358 having a first internal volume and a second fluid capacitor 360 having a second internal volume, wherein the second internal volume is greater than the first internal volume. In some embodiments, the difference in volume may be achieved by changing the height (e.g., into and out of the page as shown in fig. 8G) or any other suitable dimension (e.g., diameter) of each of the fluid capacitor 358 and the fluid capacitor 360. In the exemplary embodiment of fig. 8G, as the first fluid capacitor 358 is filled, flow is redirected from outlet "a" to outlet "B". Once the second fluid capacitor 360 is filled, flow is redirected from outlet "B" back to outlet "a". Fig. 8H illustrates a compact form of the fluid control circuit 356 of fig. 8G, wherein the inlets of each of the fluidic oscillators are fluidly coupled to each other. The compact form of the fluid control circuit 356 shown in fig. 8H is folded into three layers (e.g., tri-folded into a tri-layer fluidic device). Fig. 8I illustrates an alternative form of the fluid control loop 362 of fig. 8G, shown as fluid control loop 362 ', in which fluid control loop 362' two fluidic oscillators are positioned in a parallel flow arrangement rather than in series.

Fig. 8J-8K illustrate

fluid control circuits

364, 366, the

fluid control circuits

364, 366 each including a plurality of fluidic (e.g., fan) oscillators in a substantially parallel flow arrangement. As shown in fig. 8J, the fluidic oscillators are arranged to direct flow in the same direction (e.g., in phase, both direct flow downward 368 or both direct flow upward 370, as shown in fig. 8J, etc.). The fluidic oscillator may be a bistable fluidic oscillator and/or may be configured to "sweep" the flow stream/jet back and forth (e.g., from side to side) continuously (e.g., periodically, etc.). In other words, the fluidic oscillator may be configured to continuously redirect the flow stream exiting the fluidic oscillator between two directions (e.g., between a first direction and a second direction, along an arc between the first direction and the second direction).

Fig. 9 shows a fluid control circuit 400 for a line pressure toilet including a single bistable fluidic oscillator 402. The line pressure toilet may be identical or substantially similar in construction to the line pressure toilet 100 of fig. 1-2. In other embodiments, the configuration of the line pressure toilet may be different. For simplicity, like reference numerals have been used to identify like components. As shown in fig. 10, fluidic oscillator 402 includes an inlet channel 404, two

outlet channels

406, 408, and two resonating

chambers

410, 412. As shown in fig. 9, the first outlet passage 406 is coupled to the edge injector 118. Second outlet channel 408 is coupled to sump sprayer 120. The fluidic oscillator 402 is configured to generate a pulse flow at each of the rim jet 118 and the sink jet 120 by periodically switching the water flow between the two

outlet channels

406, 408. Among other benefits, fluidic oscillator 402 coordinates the operation of edge ejectors 118 and sink ejectors 120 using less water throughout the flush cycle than simply splitting 50-50 between the two

ejectors

118, 120.

The geometry of any of the fluidic devices described herein may be varied depending on the desired flow characteristics of the

injectors

118, 120. For example, fig. 11 shows an alternative embodiment of a bistable fluidic oscillator 414. Like the fluidic oscillator 402 of fig. 10, the fluidic oscillator 414 of fig. 11 provides flow switching capability between two

outlet channels

420, 422. As shown in fig. 11, fluidic oscillator 414 includes a single symmetric resonant chamber 416 coupled to an inlet channel 418 of the fluidic oscillator at a location upstream of two

outlet channels

420, 422. The resonance chamber 416 includes tubes (e.g., channels, flow passages, etc.). In other embodiments, the geometry of the resonant chamber 416 may be different.

In some embodiments, rather than providing pulsed flow to both

injectors

118, 120 simultaneously, the fluidic device may be reconfigured to direct the entire flow to one of the edge injector 118 and the drip tank injector 120. Fig. 12A shows a bi-stable fluidic oscillator 402 (e.g., a monostable fluidic oscillator including two outlets, fluidic amplifiers, fluidic switches, etc.) that has been modified to serve as a fluidic diverter valve 424 according to an exemplary embodiment. As shown in fig. 12A, the fluidic diverter valve 424 includes two control ports, namely a first control port 426 and a second control port 428, the first control port 426 being fluidly coupled to the first resonator chamber 410 and the second control port 428 being fluidly coupled to the second resonator chamber 412. The two

control ports

426, 428 are also coupled to the inlet passage upstream of the fluidic diverter valve 424. According to an exemplary embodiment, the fluidic diverter valve 424 includes a control switch 430 (e.g., an electronic valve or actuator), the control switch 430 configured to fluidly couple one of the two

control ports

426, 428 to the inlet channel. The percentage of the total flow through each

outlet passage

406, 408 is determined based on the position of the control switch 430 and the resulting amount of flow diverted to each of the first and

second control ports

426, 428. The amount of water required to control the direction of flow through the fluidic diverter valve 424 (e.g., the total amount of water required by the control switch 430) is small compared to the primary flow rate of the fluidic diverter valve 424 (e.g., the flow rate of water entering the fluidic diverter valve 424). Into jet diverter valve 424). In the exemplary embodiment of fig. 12A, the amount of water (e.g., the control flow) required to control the direction of flow through the jet diverter valve 424 is about 1/10 of the primary flow.

In some embodiments, the control switch 430 is a push button valve that diverts all flow to one of the first control port 426 and the second control port 428. In other embodiments, control switch 430 is a diverter valve (e.g., a ball valve, etc.) that allows a portion of the total flow to be diverted to each of control port 426 and control port 428 simultaneously. The fluidic diverter valve 424 may also be used in other applications in lieu of applications using conventional diverter valves. For example, jet diverter valve 424 may be used in a bathtub, a shower unit including a single showerhead, or a shower unit including multiple showerheads. The jet diverter valve 424 can also be used as part of a sink/kitchen hand sprayer (e.g., to selectively divert flow to a subset of nozzles on a spray head, etc.) or a bathroom hand sprayer. Fig. 12B shows an alternative form of the fluidic diverter valve 424 of fig. 12A in which a monostable fluidic oscillator 403 is used in place of the bistable fluidic oscillator 402. Among other benefits, the use of the monostable fluidic oscillator 403 reduces the number of flow lines required by the fluidic splitter valve 424.

Fig. 13 illustrates a fluidic diverter valve 432 including a single control port 434 according to an exemplary embodiment. Fig. 14-16 illustrate the operation of the fluidic diverter valve 432 of fig. 13. As shown in fig. 14-16, a portion of the total flow exiting the diverter valve 432 through either of the two

output passages

436, 438 is determined based on the flow of water entering the fluidic diverter valve 432 through the control port 434. As the flow rate of water through the control port 434 increases, a greater portion of the water is ejected through the lower (e.g., eductor) output channel 436. While a single fluidic diverter valve 432 is shown in fig. 13, it will be appreciated that multiple fluidic diverter valves may be simultaneously controlled to simultaneously provide flow to control ports in different fluidic diverter valves by using the operating principles described herein, such as by using a single flow control valve.

Fig. 17A shows a flow schematic of a fluidic switching device, shown as switching device 2500, the switching device 2500 configured to automatically switch flow from a first outlet port 2502 to a second outlet port 2504 after a predetermined period of time. The switching device 2500 includes an inlet port 2506, a fluid capacitor 2508, a side passage 2510, first and

second outlet branches

2512, 2514, a first separator portion 2516, a second separator portion 2518, and a transverse passage 2520. The first separator portion 2516 is fluidly connected to the side channel 2510 and the second separator portion 2518 and is configured to deliver water from the inlet port 2506 to the side channel 2510 and the second separator portion 2518. Side channel 2510 fluidly connects first separator portion 2516 with fluid capacitor 2508. Fluid capacitor 2508 may be any fluid reservoir sized to hold a predetermined volume of fluid. In the exemplary embodiment of fig. 17A, the fluid capacitor 2508 is a hollow cylindrical tube.

As shown in fig. 17A, the second separator portion 2518 fluidly connects the first separator portion 2516 to first and

second outlet branches

2512, 2514, the first and

second outlet branches

2512, 2514 each being connected to a respective one of the outlet ports. Fluid entering the second separator portion 2518 from the first separator portion 2516 is directed to the first outlet branch 2512 via the coanda effect. This first operational stage continues for a predetermined period of time until the fluid capacitor 2508 has been filled with fluid and/or until sufficient fluid pressure (e.g., a fluid power head, etc.) has been generated in the fluid capacitor 2508. At this point, water entering the side channel 2510 is redirected through a lateral channel 2520, which lateral channel 2520 fluidly connects the side channel 2510 to the second separator portion 2518. As shown in fig. 17A, the side channel 2510 is fluidly connected to the inlet port 2506 at two different locations upstream of the first and second outlet ports 2502, 2504 (e.g., a first location 2517 upstream of a second separator portion 2518 in fluid receiving communication with the inlet port 2506, and a second location 2519 at the second separator portion 2518 proximate to the inlet of the second separator portion 2518). As shown in fig. 17A, the side channel 2510 includes a converging portion 2522 immediately upstream of the side channel 2510 to prevent fluid from entering the lateral channel 2520 before the fluid capacitor 2508 is filled with fluid. The transverse passage 2520 also includes a converging portion 2524, the converging portion 2524 forming a nozzle at the inlet of the second separator portion (second location 2519) to help redirect (e.g., switch, etc.) the fluid flow from the first outlet branch 2512 to the second outlet branch 2514.

According to an exemplary embodiment, fluid flow through the first outlet branch 2512 is completely shut off after a predetermined period of time. In other embodiments, a portion of the fluid may continue to flow through the first outlet branch 2512 after a predetermined period of time. The flow of fluid through the second outlet branch 2514 continues until the water supply to the inlet port 2506 is cut off and/or the fluid capacitor 2508 is emptied.

Among other benefits, the switching device 2500 of fig. 17A provides timed switching of flow between multiple outlets that does not require any interaction by the user or the valve, thereby eliminating the need for moving parts (i.e., the switching device includes only fixed parts). The switching device 2500 redirects a single pressurized fluid flow between two passages (e.g., a first outlet branch 2512 and a second outlet branch 2514) without separate fluid flows and without independent pressure control at the outlet ports.

The relative dimensions and geometry of the channels in fig. 17A are shown for illustrative purposes only. It will be appreciated that the flow characteristics through the device may be manipulated by varying the design of the switching device 2500. For example, the predetermined period of time before switching occurs can be modified by making a change to the size and/or shape of the fluid capacitor 2508. Additionally, the maximum allowable back pressure (e.g., flow pressure, etc.) that may be maintained at the first outlet port 2502 or the second outlet port 2504 will vary depending on the geometry of the channel and the fluid pressure at the inlet port 2506.

Fig. 17B shows a flow schematic of a fluidic switching device, shown as switching device 2600, found on the fluidic switching device 2500 of fig. 17B. The switching device 2600 is configured to perform two separate switching operations, namely a first operation to switch flow from the first outlet port 2602 to the second outlet port 2604, and a second operation to switch flow from the second outlet port 2604 back to the first outlet port 2602. In the embodiment of fig. 17B, the switching device 2600 includes fluid channels in two separate layers that are stacked or formed one over the other. The first layer 2606 of the switching device 2600 is the same as or similar to the switching device 2500 of fig. 17A. The first layer 2606 is fluidly coupled to fluid capacitors, shown as a first capacitor 2607 and a second capacitor 2609, the first and

second capacitors

2607, 2609 are used to control the timing of the switching operation.

The second layer 2608 of the switching device 2600 includes an inlet port 2610 and two outlet ports (e.g., a first outlet port 2602 and a second outlet port 2604). The second layer 2608 also includes inlet channels 2612, separator portions 2614, and return channels 2616. As shown in fig. 17B, inlet channel 2612 fluidly couples inlet port 2610 with separator portion 2614 and inlet port 2618 of first layer 2606. Separator portion 2614 fluidly connects inlet port 2610 with first outlet port 2602 and second outlet port 2604. The return channels 2616 fluidly connect the separator portion 2614 with the outlet channels 2617 of the first layer 2606.

In operation, fluid received through the inlet port 2610 is split between the inlet port 2618 of the first layer 2606 and the converging portion of the inlet channel 2612. The first layer 2606 redirects the fluid to both the return channel 2616 and the first capacitor 2607. Fluid is discharged from the return channel 2616 into the diverter portion 2614, which causes fluid in the second layer 2608 to exit through the first outlet port 2602. The flow through the first outlet port 2602 continues for a first predetermined period of time until sufficient back pressure has been created in the first capacitor 2607 (e.g., until the first capacitor 2607 has been filled with fluid), which initiates (e.g., triggers, etc.) a first switching operation. At this point, the fluid in the first layer 2606 is redirected (e.g., switched) to the second capacitor 2609 and away from the first capacitor 2607 and the return channel 2616. As fluid flow through the return channel 2616 is shut off, fluid entering the separator portion 2614 in the second layer 2608 is redirected by the coanda effect away from the first outlet port 2602 and toward the second outlet port 2604.

Flow through the second outlet port 2604 continues for a second predetermined period of time that is based on the volume of the second capacitor 2609. Once sufficient backpressure is established in the second capacitor 2609, fluid is redirected from the first layer 2606 back to the return channel 2616 in a second switching operation, the return channel 2616 again switches flow within the separator portion 2614 back toward the first outlet port 2602 (flow through the second outlet port 2604 will stop). Flow through the first outlet port 2602 continues until the supply of fluid to the inlet port 2610 is cut off and/or the first and

second capacitors

2607, 2609 are drained of fluid.

The stacked (e.g., layered) fluid channel arrangement shown in fig. 17B should not be considered limiting. Fig. 18-19 illustrate a fluidic switch device shown as a switch device 2700, the switch device 2700 incorporating the multiple layers of fig. 17B into a single level (e.g., layer, etc.). The switching device 2700 operates in a similar manner as described with reference to fig. 17B. The switching device 2700 includes: (i) the valve body 2702; (ii) a plurality of fluid capacitors shown as a first capacitor 2704 and a second capacitor 2706; and (iii) a plurality of fluid connectors shown as fittings 2708. As shown in fig. 19, the valve body 2702 includes the various fluid passages/channels described with reference to fig. 17B. The valve body 2702 is integrally formed as a single unitary body. In other embodiments, the valve body 2702 may be formed from multiple components that are connected using fasteners (and sealing members such as O-rings, gaskets, etc.) or adhesive products. In other embodiments, the valve body 2702 may be made of multiple pieces that are connected by welding or another suitable watertight bonding operation. As shown in fig. 18-19, the fluid capacitor and fitting 2708 is mechanically connected to the valve body 2702. The first and

second capacitors

2704 and 2706 are attached to the upper surface of the valve body 2702 and are fluidly coupled to the outlet port of the switching device 2700. According to an exemplary embodiment, the fluid capacitor is a hollow cylindrical tube. In other embodiments, the fluid capacitor may take another suitable shape. As shown in fig. 18, the fluid capacitor may be completely isolated from the environment surrounding the switching device 2700. In other embodiments, one and/or both fluid capacitors may include an upper opening configured to allow air to vent from the capacitor when the capacitor is filled with fluid. The size (e.g., height, diameter, etc.) of each of the first and

second capacitors

2704 and 2706 can be varied to modify the duration of the first and second predetermined time periods.

Fig. 20-23 show various alternative flow schematics that may be used in the design of an automatic fluidic switching device. The switching device 2800 of fig. 20 includes three separate fluid capacitors to achieve a third switching operation instead of two. Fig. 21 shows a switching device 2850 incorporating a bistable fluidic oscillator in the third layer of the fluidic switching device. The switching device 2600 of fig. 17B is a control circuit for the bistable fluidic oscillator of fig. 21, and is used to direct fluid flow through the bistable fluidic oscillator. In this manner, the switching device 2600 may be used to direct a greater flow of fluid through the switching device 2850 of fig. 21 than the switching device 2600 itself (e.g., the maximum flow of fluid through the switching device 2850 of fig. 21 is greater than the maximum flow of fluid through the channels of the control circuit). In other embodiments, the control loop may be replaced by the switching device 2800 described with reference to fig. 20 or another switching device. Fig. 22 shows a switching device 2900 that operates in a similar manner as the fluidic switching device 2500 of fig. 17A, but is arranged in a vertical orientation. As shown in fig. 22, the fluid capacitor 2902 is coupled to an end surface of the switching device 2900 rather than to an upper surface that extends parallel to the flow channel. In addition, the outlet ports of the switching device 2900 are disposed on different surfaces of the valve body (e.g., a lower surface 2904 and a side surface 2906 that is substantially perpendicular to the lower surface 2904). Fig. 23 shows a switching device 3000, the switching device 3000 configured to switch flow between three separate outlet ports instead of two. The effective outlet channel (e.g., the open outlet channel) of the switching device 3000 is determined based on which fluid capacitor is filled. If both fluid capacitors are filled, the fluid will pass through the centermost outlet channel.

Fig. 24 shows a switching device 3100, the switching device 3100 comprising a plurality of individual switching devices linked together in series. Similar to the switching device 3000 of fig. 23, the switching device 3100 of fig. 24 is configured to switch flow between three separate outlet ports instead of two. In the embodiment of fig. 23, each individual switching device implements the flow channel design described with reference to fig. 17A. In other embodiments, the design of the flow channels may be different. Among other benefits, because the capacitors are arranged in series (and because more than two outlets are available to facilitate the draining operation), the switching device 3100 drains at a faster rate than other single piece fluidic switch designs. In the exemplary embodiment of fig. 24, the size of the flow channel in the second individual switching device (located downstream of the first individual switching device) is larger than the size of the flow channel in the first individual switching device, which advantageously improves the flow characteristics through the switching device 3100. In other embodiments, the size of the channels between the individual switching devices may be the same, or a second individual switching device may have channels that are smaller in size than the first individual switching device.

The automatic jet switch device of fig. 17A-24 can be used to facilitate a flush operation in a toilet without the need for moving parts and/or electronic circuitry, among other benefits. Referring to fig. 25, a whirlpool flush toilet assembly according to an exemplary embodiment is shown as toilet 3200. The toilet 3200 includes a edge jet subassembly 3202, the edge jet subassembly 3202 configured to alternately inject fluid (e.g., water) via a first jet 3204 onto (i) a right surface 3206 of the toilet bowl 3208, and via a second jet 3210 onto (ii) a left surface 3212 of the toilet bowl 3208 opposite (e.g., 120 ° spaced from) the left surface 3212. As shown in fig. 25, each of the first and

second nozzles

3204, 3210 is disposed in a rim area 3207 of the toilet bowl 3208 and is positioned to direct fluid in a direction substantially tangential to one of the right surface 3206 or the left surface 3212. The edge ejector subassembly 3202 also includes a fluidic switching device, which may be the same as or similar to the switching device 2500 of fig. 17A. In other embodiments, the design of the fluidic switching device may be different. As shown in fig. 25, the first nozzle 3204 is fluidly connected to the first outlet port 2502 of the switching device 2500, and the second nozzle 3210 is fluidly connected to the second outlet port 2504. The inlet port 2506 of the switching device 2500 is fluidly connected to a flush valve that is connected to a fluid supply line (e.g., a fluid conduit, a flow tube, etc.) at a line pressure (e.g., between 40psi and 60psi, or another suitable fluid pressure). The switching device 2500 may be disposed within the toilet body or in another suitable location.

During a flush cycle, fluid is initially directed by the switching device 2500 through the first outlet port 2502 and out through the first nozzle 3204. Fluid is directed by the first nozzle 3204 onto the right surface 3206 and around the perimeter of the toilet bowl 3208 in a circumferential direction (e.g., clockwise, etc.). After a predetermined period of time has elapsed (e.g., after the capacitor has been filled with fluid, etc.), the switching device 2500 redirects the fluid flow toward the second outlet port 2504. Fluid is directed by the second jet 3210 onto the left surface and around the perimeter of the toilet bowl 3208 in a circumferential direction (e.g., counterclockwise, etc.). Due to the relative positions of the jets, the flow from each jet need only cover approximately 270 ° along the perimeter of the toilet bowl 3208 in order to completely cover the toilet bowl 3208 with flush fluid. This reduces the fluid velocity required to completely cover the toilet bowl 3208, as compared to a rotary flush toilet that includes only a single jet. The alternating flow direction of the fluid in the toilet bowl 3208 may also provide a pleasing aesthetic for the user during a flush cycle. Among other benefits, alternating flow directions improves cleaning by scrubbing the surface of the toilet bowl 3208 in two directions along most surfaces. In other embodiments, the location of the nozzles and/or the number of nozzles may be different.

Fig. 26 illustrates a toilet assembly 3300 in which a jet switching device is included in the toilet assembly 3300 to increase the fill rate of a toilet bowl 3302 after a flush event (e.g., operation, etc.). In the embodiment of fig. 26, the switching device is the same as or similar to the switching device 2500 of fig. 17A. In other embodiments, different fluidic switching devices may be used. The switching device 2500 may be disposed within the flush tank 3304 of the toilet assembly 3300 or at another suitable location (e.g., behind the flush tank, out of the view of a user, etc.). The inlet port 2506 of the switching device 2500 is fluidly connected to the fill valve 3306 of the toilet assembly 3300. The first outlet port 2502 is fluidly coupled to a flush valve 3308 in the flush tank 3304.

During a flush event, fluid (e.g., water) is directed by the switching device 2500 from the fill valve 3306 and directly into the toilet bowl 3302 (via the first outlet port 2502). Flow continues from the switching device 2500 into the toilet bowl 3302 until the bowl 3302 is filled with fluid (e.g., for a predetermined period of time). At this point, the switching device 2500 redirects the flow to the flush tank 3304 to fill the tank for the next flush cycle. Among other benefits, the toilet assembly 3300 of fig. 26 reduces the amount of time required to refill the toilet bowl 3302 after a flush event so that another person can begin using the toilet. For example, the switch 2500 may fill the toilet bowl 3302 in approximately 10 seconds, which may otherwise take 50 seconds. The toilet assembly 3300 will also remain cleaner by continuously maintaining the fill level of fluid within the toilet bowl 3302.

The jet switching device described with reference to fig. 17A to 24 may also be used to facilitate the cleaning operation of the toilet. For example, fig. 27 shows a chemical dispensing system 3400 for a toilet assembly according to an example embodiment. The chemical dispensing system 3400 is configured to provide alternating flows of different fluids, including a first fluid and a second fluid, to a toilet bowl. In some embodiments, each of the first and second fluids is a cleaning solution configured to perform a different cleaning operation. For example, the first fluid may be an acid and the second fluid may be a base. The first fluid may be formulated to remove organics from the surface of the toilet bowl (e.g., the first fluid may be a bleach) and the second fluid may be formulated to remove soils from the surface of the toilet bowl. As such, the chemical dispensing system 3400 may form part of a biofilm remediation system for a toilet assembly. In other embodiments, the color of the first fluid may be different than the color of the second fluid to provide a pleasing aesthetic to the user during the flush cycle. In other embodiments, the first fluid and the second fluid may be the same, but may be provided to different areas of the toilet assembly (e.g., in an edge area of a toilet bowl, in a sump area of a toilet bowl, in a flush tank, etc.).

As shown in fig. 27, the chemical distribution system 3400 includes a fluidic switching device (e.g., switching device 2500 of fig. 17A, etc.) and a plurality of chemical saturators downstream of the switching device. The first chemical saturator 3402 is fluidly connected to the first outlet port of the switching device. The second chemical saturator 3404 is fluidly connected to the second outlet port of the switching device. In this manner, fluid is first dispensed from the first chemical saturator 3402 and then dispensed from the second chemical saturator 3404 after a predetermined period of time. In some embodiments, the chemical dispensing system 3400 includes a separate actuator to allow a user to manually initiate a cleaning operation separate from a flush event. Alternatively or in combination, the actuator may be connected to or form part of a flush valve such that the release of fluid from the chemical dispensing system 3400 is coordinated with a flush event.

According to an exemplary embodiment, the fluidic switching device includes a drainage system to reduce the time required to reset the device after use. Referring to fig. 28, a fluidic switching device according to an exemplary embodiment is shown as switching device 3500. In the exemplary embodiment of fig. 28, the switching device 3500 has a similar configuration to the switching device 2500 described with reference to fig. 17A. In other embodiments, the switching device may have a different design (e.g., any of the fluidic switching devices of fig. 17B-24, etc.). As shown in fig. 28 to 29, the water discharge system 3501 of the switching device 3500 includes a separate water discharge valve 3506 for each of the fluid capacitors. Fluid is discharged from the fluid capacitor through a drain opening 3502 provided in an upper wall of the valve body 3504.

Fig. 29 shows an exemplary water discharge valve 3506 for a water discharge system 3501. The water drain valve 3506 includes a support structure 3508 and a plunger 3510, the plunger 3510 being coupled to the support structure 3508 and disposed within the support structure 3508. The plunger 3510 is biased into the open position by a spring 3512. The water drain valve 3506 further includes a plurality of sealing members including an outer sealing member 3514 and a plunger sealing member 3516, the outer sealing member 3514 being between the support structure 3508 and the valve body 3504 (see fig. 28) and coupled to the support structure 3508, and the plunger sealing member 3516 being between the plunger 3510 and the support structure 3508 and coupled to the plunger 3510.

Fig. 30 to 31 show the operation of the water discharge valve 3506. As shown in fig. 30 to 31, the water discharge valve 3506 is disposed within the water discharge channel 3518 of the switching device 3500, between the fluid capacitor and the water discharge outlet port 3520, immediately below the water discharge opening 3502. In some embodiments, as shown in fig. 30-31, the water discharge valve 3506 may be incorporated into an existing flow channel of the switching device (e.g., into a channel between the switching device and the passage of the inlet port to the fluid capacitor). In other embodiments, as shown in fig. 28, the water drain valve 3506 may be incorporated into a separate fluid opening at the bottom (e.g., lower end) of the fluid capacitor. As shown in fig. 30 to 31, the position of the water discharge valve 3506 is determined based on the fluid pressure at the lower end portion of the capacitor (near the plunger 3510). When the capacitor is filled, fluid pressure at the lower end of the fluid capacitor (and/or fluid velocity acting on the face of the plunger 3510) urges the plunger 3510 toward the drain outlet port 3520. Plunger seal member 3516 engages support structure 3508 to substantially prevent any fluid from exiting the capacitor. Once the water pressure is removed from the face of the plunger 3510, the plunger 3510 retracts to open a fluid path between the drain opening 3502 and the drain outlet port 3520 so that fluid can be quickly drained from the capacitor.

The design of the drainage system 3501 described with respect to fig. 28-31 should not be considered limiting. Various modifications are possible without departing from the inventive concepts disclosed herein. For example, in some embodiments, a single drain valve may be used to selectively control fluid flow through multiple drain channels. In other embodiments, the drain valve may be at least partially fluidly connected to the inlet port of the switching device such that the plunger is actuated as a function of fluid pressure at the inlet port rather than fluid pressure near the drain opening in the valve body. For example, fig. 32-34 illustrate a drain system 3600 for a switching device in which each drain valve 3602 is fluidly connected to an inlet port 3604 of the switching device. The water discharge valve 3602 includes a diaphragm 3608, and the diaphragm 3608 is disposed in the flow manifold near the lower end of the fluid capacitor. Control conduit 3610 extends between the lower end of the fluid capacitor and inlet port 3604. As shown in fig. 33-34, diaphragm 3608 fluidly isolates control conduit 3610 from both drain channel 3612 and drain opening 3614 at the lower end of the capacitor.

As shown in fig. 33-34, diaphragm 3608 is configured to selectively fluidly couple drain opening 3614 and drain channel 3612 as a function of fluid pressure from a source (e.g., as a function of fluid pressure at inlet port 3604). When the fluid pressure from the source is high (e.g., when the switching device is activated), diaphragm 3608 presses upward against drain opening 3614 and against the inlet to drain 3612. This allows the fluid capacitor to be filled with fluid. When the fluid pressure from the source is low (e.g., after deactivating the switching device), diaphragm 3608 is allowed to move away from drain opening 3614 and away from the inlet to drain 3612, thereby fluidly coupling drain opening 3614 to drain 3612. In some embodiments, drainage system 3600 further includes a spring to bias diaphragm 3608 away from drainage opening 3614 and drainage channel 3612 to improve drainage performance (e.g., to reduce drainage time, etc.).

In various exemplary embodiments, the position of the drain valve may be different. For example, fig. 35 shows a fluidic switching device 3700, which fluidic switching device 3700 comprises a drain valve 3701 just downstream (within the first separator section 3704) of an inlet port 3702. Among other benefits, the drain valve 3701 of fig. 35 reduces the time required to drain the device 3700 relative to a switching device that must drain water through any of the outlet ports.

Fig. 36 shows yet another exemplary embodiment of a drain system 3800 of a fluidic switching device. The drain system 3800 includes a fluid capacitor 3804 having a vent opening 3802, the vent opening 3802 allowing air to flow into the fluid capacitor 3804 to reduce a drain time. In the exemplary embodiment of fig. 36, each vent opening 3802 is disposed on a respective one of the fluid capacitors 3804, on an upper end 3806 of the fluid capacitors 3804. The drain system 3800 may also include a float 3808 (e.g., a buoyancy element, a spherical float, etc.) that selectively obstructs the vent opening 3802 based on a fill level of fluid within the fluid capacitor 3804. The float 3808 rests on top of the fluid, and the float 3808 is urged by the fluid against the vent opening 3802 when the fluid level exceeds a predetermined threshold. Among other benefits, the use of the float 3808 reduces the restriction on the size of the vent opening 3802 to improve drainage time.

In other embodiments, the vent opening 3802 may be closed (e.g., blocked, sealed, etc.) to allow pressure to build up within the fluid capacitor 3804 as the fluid level rises. Once the switch is deactivated (e.g., once flow to the inlet port is cut), the air pressure forces the fluid out of the capacitor, thereby emptying the capacitor faster without the need for other moving components.

In some embodiments, the geometry of the fluidic oscillator may be modified to coordinate the flow through two or more ejectors while also controlling the proportion of the total flow exiting the fluidic device through each of the ejectors. Fig. 37 shows an asymmetric bistable fluidic oscillator 440, the asymmetric bistable fluidic oscillator 440 configured to preferentially deliver a pulsed flow of water to one of two injectors. Similar to fluidic oscillator 414 of fig. 11, fluidic oscillator 440 of fig. 37 includes an inlet channel 442 and two

outlet channels

444, 446, the two

outlet channels

444, 446 being configured to deliver water to a plurality of sprayers of the plumbing fixture. As shown in fig. 37, an axis (e.g., a central axis) of the inlet passage 442 that is parallel to the direction of flow through the inlet passage 442 is biased toward an upper outlet passage 446 of the fluidic oscillator 440. In this way, the flow is preferentially directed (by occasional switching) towards the upper outlet passage 446.

Fig. 38A-38B illustrate yet another embodiment of a bi-stable fluidic oscillator 448. As shown in fig. 38A-38B, the fluidic oscillator 448 utilizes a piezoelectric driven actuator 450 (e.g., a piezoelectric vibrator or other controllable vibration mechanism) to switch flow between one of the two

outlet channels

452, 454 of the fluidic oscillator 448. The frequency of the piezo-driven actuator 450 may be modified to adjust the frequency of the pulsating flow delivered through each

outlet channel

452, 454. In some embodiments, the piezo-driven actuator 450 may be configured to pump water through the fluidic oscillator 448 into one or more jets of the plumbing fixture under its own power (e.g., without a supply pressure on an input branch of the fluidic oscillator 448).

Fig. 39A to 39C show a bistable fluidic oscillator 449 including a plurality of piezoelectric elements 451. Each of the piezoelectric elements is positioned in the control port 453 of the bistable fluidic oscillator 449. The fluidic control loop may additionally include a controller 455 to selectively activate and deactivate each of the piezoelectric elements 451 to switch flow through different branches (e.g., outlet passages) of the bistable fluidic oscillator 449.

The fluid control circuit can be modified to include a plurality of interconnected fluidic devices. These devices may be configured to interact with each other to set the operating frequency of the pulsating flow at one or more of the injectors. Fig. 40 illustrates a modified form of the fluid control circuit 400 of fig. 9, according to an exemplary embodiment. As shown in FIG. 40, fluid control circuit 456 includes a lower stage fluidic oscillator coupled to each of edge jet 118 and water sump jet 120, which is shown as edge jet oscillator 458 and water sump jet oscillator 460.

Lower stage oscillators

458, 460 are each arranged in a series flow arrangement with upper stage fluidic oscillator 402 (e.g., each of

lower stage oscillators

458, 460 is fluidly coupled to a corresponding one of the output channels of upper stage fluidic oscillator 402). The frequency of the water pulses at the sump sprayer is a function of the geometry and frequency of both the superior oscillator 402 and the sump sprayer oscillator 458. The frequency of the water pulses at the sump sprayer is a function of the geometry and frequency of both the superior oscillator 402 and the edge spray oscillator 460. Among other benefits, fluid control loop 456 of FIG. 40 provides a mechanism by which the overall operating frequency of fluid control loop 456 (e.g., via superior fluidic oscillator 402) may be adjusted while maintaining a different operating frequency at each of edge ejectors 118 and water collection tank ejector 120. This configuration is particularly desirable where waste accumulation occurs preferentially at certain locations of the toilet. In these cases, the jets used to clean the problematic areas may be tuned independently of the other jets to improve waste removal performance.

Fig. 41-43 illustrate different arrangements of fluidic oscillators that may be implemented at the face of the injector, according to various exemplary embodiments. Fig. 41 shows a chain arrangement of fluidic oscillators 470, with an additional set of fluidic oscillators at each outlet. Fig. 42 shows a side-by-side arrangement of injectors formed using a single fluidic oscillator 462 (e.g., at the upper outlet of fig. 41). Fig. 43 shows a quadrilateral (e.g., rectangular) arrangement of ejectors formed using multiple

fluidic oscillators

464, 466 arranged in a parallel flow arrangement (e.g., at the lower outlet of fig. 41). Linking multiple fluidic oscillators together can, among other benefits, coordinate flow through each ejector while also providing a level of independent control over the operation of each ejector.

In some embodiments, the jets of the plumbing fixture may be angled in different directions to more evenly distribute water over the surface of the plumbing fixture and improve waste removal performance. Fig. 44-45 show a toilet that is the same as or similar to the toilet 100 of fig. 1-2. In the embodiment of fig. 44-45, the toilet includes a toilet body 107, the toilet body 107 defining a fluid receiving reservoir, shown as toilet bowl 106. The toilet also includes a single fluidic oscillator 500, the single fluidic oscillator 500 configured to dispense water on the interior surface of the toilet bowl 106. In fig. 44, the fluidic oscillator 500 is coupled (e.g., mounted, engaged, fastened, etc.) to the toilet body 107 along the back wall of the inner surface. The fluidic oscillator 500 is positioned to direct water toward both the forward wall of the interior surface and the water collection trough 114. In other embodiments, fluidic oscillator 500 may be positioned to direct water to other surfaces of toilet bowl 106. In fig. 45, fluidic oscillator 500 is disposed along a sidewall of the inner surface and is configured to direct water toward both the forward and rear walls. In some embodiments, fluidic oscillator 500 includes a fluidic diverter valve configured to switch flow between a plurality of angled injectors. According to an exemplary embodiment, as shown in fig. 46, the fluidic oscillator 500 is a compact (e.g., small size, low profile, etc.) fan oscillator 502 that is configured to continuously redirect (e.g., swing up and down as shown in fig. 46) the flow of water to different locations within the toilet bowl 106.

In some embodiments, the fan oscillator 502 may be coupled to the rim 112 of the toilet. In other embodiments, the fan oscillator 502 may be coupled to the inner surface of a rimless toilet bowl. In other embodiments, the fan shaker 502 may form part of a bidet wand for cleaning the user's body and/or spot cleaning a troublesome area during a rinse cycle. The fan oscillator 502 may be configured to dispense a jet surface cleaning spray, a pre-use wetting spray, or a flushing spray onto the interior surface of the toilet bowl 106 during a flush cycle and/or between flushes to maintain the appearance of the toilet bowl 106.

The geometry of the fan oscillator 502 may vary depending on the desired frequency, flow rate, and distribution area. The design and/or arrangement of the fluid passages within the fan oscillator may also be different in various exemplary embodiments. Referring now to fig. 47-48, a fluidic oscillator 3900 (e.g., a fan oscillator, etc.) is shown that produces an oscillating flow of fluid at an outlet port 3902. The fluidic oscillator 3900 includes an inlet port 3905 and a plenum chamber 3904 (e.g., a cavity, a space, etc.), the plenum chamber 3904 fluidly connecting the inlet port 3905 and the outlet port 3902. The fluidic oscillator 3900 further comprises a recessed region 3906 (e.g., a slot) disposed along the lower wall of the plenum chamber 3904 and extending between the sidewalls 3908 of the plenum chamber 3904 such that the recessed region 3906 fills the entire width of the plenum chamber 3904. According to an exemplary embodiment, fluidic oscillator 3900 is formed from a single piece of material (e.g., fluidic oscillator 3900 is a single monolithic body, cartridge, etc.). In the exemplary embodiment of fig. 47, a width 3910 of the inflation chamber 3904 between the side walls 3908 is approximately 4 times a width 3912 at an inlet 3914 to the inflation chamber 3904, a distance 3916 in the flow direction between an upstream end 3918 of the recessed region 3906 and the inlet 3914 (e.g., between the inlet 3914 and the outlet port 3902) is approximately half an overall length 3920 of the inflation chamber 3904, a length 3922 of the recessed region 3906 in the flow direction is approximately equal to the width 3912 of the inlet 3914, a length 3924 of a channel 3926 fluidly coupling the inlet port 39014 to the inlet port 3905 is approximately equal to the overall length 3920 of the inflation chamber 3904, and a width 3926 of the outlet port 3902 is approximately equal to the width 3912 of the inlet port. In other embodiments, the geometry of the flow channels within fluidic oscillator 3900 may be different. Among other benefits, the geometry of the fluidic oscillator 3900 illustrated in fig. 46-47 can be made of vitreous china and is particularly suitable for incorporation into a toilet or urinal.

Fig. 49 illustrates a toilet assembly 4000 according to an exemplary embodiment, the toilet assembly 4000 including an oscillating rim sprayer system 4002. The oscillating edge jet system 4002 comprises a plurality of fluidic oscillators 4004, the plurality of fluidic oscillators 4004 configured to dispense fluid in a sweeping (e.g., oscillating, fanning, side-to-side motion, etc.) pattern onto a surface of a toilet 4006 (e.g., a toilet bowl 4008). Fluidic oscillator 4004 can be the same as or similar to fluidic oscillator 3900 described with reference to fig. 47-48 and/or fluidic oscillator 502 described with reference to fig. 46. As shown in fig. 49, each of the fluidic oscillators 4004 is disposed in a rim area 4010 of the toilet bowl 4008 along the upper perimeter of the toilet. The fluidic oscillator 4004 may be disposed within a rim channel 4009 extending inward from the outer periphery of the toilet bowl 4008. For example, the edge channel 4009 may be a depending channel (e.g., a "U" -shaped channel) that includes a horizontal portion 4011 and a vertical portion 4013, the horizontal portion 4011 extending radially inward (along an upper edge of the toilet bowl 4008) from an outer periphery of the toilet bowl 4008, the vertical portion 4013 extending downward from the horizontal portion in a generally vertical orientation relative to the horizontal portion 4011. In some embodiments, fluidic oscillator 4004 can be a cartridge disposed at least partially within edge channel 4009 and/or connected to the edge channel. In other embodiments, fluidic oscillator 4004 can be at least partially molded into edge channel 4009.

As shown in fig. 49, the oscillating edge jet system 4002 comprises six jet oscillators 4004, the six jet oscillators 4004 being equally spaced in increments of 72 ° along the perimeter of the toilet bowl 4008 to completely cover the interior surface of the toilet bowl 4008 in at least one vertical position above the water collection trough (e.g., to fluidly cover the interior surface of the toilet bowl 4008 along the entire perimeter of the toilet bowl 4008 in at least one vertical position between the water collection trough and the edge area). In other embodiments, system 4002 may include additional or fewer fluidic oscillators. The spacing between adjacent fluidic oscillators may also be different in various exemplary embodiments. Outlet port 4003 of each of the plurality of fluidic oscillators 4004 is positioned to direct fluid to move from side to side (e.g., in a generally circumferential direction 4005) along a plane that is generally parallel to or slightly angled toward the inner surface (e.g., such that a distance between a flow of fluid exiting outlet port 4003 at a first side of outlet port 4003 and the inner surface is substantially the same as a distance between a flow of fluid exiting outlet port 4003 at a second side of outlet port 4003 opposite the first side). The flow pattern created by fluidic oscillator 4004 provides, among other benefits, a pleasant aesthetic for the user of the toilet.

In the exemplary embodiment of fig. 49, each of the fluidic oscillators 4004 is oriented substantially parallel to a vertical reference line 4014 that passes through the edge region. In other embodiments, the at least one fluidic oscillator 4004 can be arranged at an angle 4016 relative to a vertical reference line 4014. According to an exemplary embodiment, each of the fluidic oscillators 4004 is positioned at an angle 4016 relative to the vertical reference line 4014, the angle 4016 being in a range between about 20 ° and 30 °, such that the flow exiting through the outlet port 4003 circulates along the surface of the toilet bowl in a clockwise direction during flushing. In other embodiments, the arrangement of fluidic oscillator 4004 may be different.

According to an exemplary embodiment, the combined flow through the fluidic oscillators 4004 (e.g., from edge sprayer nozzles) is about 4.5 gallons per minute or the flow through each fluidic oscillator 4004 is about 0.75 gallons per minute. In other embodiments, the combined flow through the oscillating edge ejector system 4002 may be different. The cycle frequency can be about 0.5Hz, 1Hz, 5Hz, 10Hz, 20Hz, 40Hz, 60Hz, 80Hz, 100Hz, or any range between and including any two of the foregoing values (e.g., at least about 60Hz to about 80Hz, etc.) to maximize the aesthetic appearance of the fluidic oscillator 4004 in operation and its effectiveness in cleaning the surface of the toilet bowl 4008. In other embodiments, the frequency of the fluid oscillations generated at the outlet port of fluidic oscillator 4004 can be different.

Fig. 50A-50B illustrate a flushing system 4100 for a toilet 4102 according to an exemplary embodiment, the flushing system 4100 including an oscillating rim sprayer system 4104. The oscillating edge jet system 4104 includes a plurality of jet oscillators 4118 arranged in a ring (e.g., a circular arrangement, etc.). The fluidic oscillators 4118 are fluidly connected to each other. In other embodiments, each of the fluidic oscillators 4118 is individually fluidly connected to the inlet of the oscillating edge jet system 4104. As shown in fig. 50A-50B, the irrigation system 4100 includes a jet switching device 4106 and a sump sprayer 4108. The fluidic switch 4106 can be the same as or similar to the switch 2700 of fig. 18. In other embodiments, the fluidic switching device 4106 can be different. As shown in fig. 50B, a plurality of fluid capacitors for the jet switching device 4106 can be positioned behind the toilet bowl 4109 (e.g., within the wall in which the toilet bowl 4109 is installed, etc.). In other embodiments, the position of the fluidic switching device 4106 can be different. The sump sprayer 4108 is a fluid nozzle provided in a sump area of the toilet bowl 4109 at a lower end of the toilet bowl 4109. In other embodiments, the sump sprayer 4108 may be replaced with a fluid nozzle in the upward leg of the outlet portion of the toilet downstream of the sump area.

The jet switching device 4106 is configured to coordinate the operation of the oscillating edge jet system 4104 and the water collection trough jet 4108 during a flushing event (e.g., flush, etc.). An inlet port 4110 of the jet switching device 4106 is fluidly connected to a flush valve of the line pressure toilet 4102. A first outlet port 4114 of the jet switching device 4106 is fluidly connected to the oscillating edge eductor system 4104, and a second outlet port 4116 of the jet switching device 4106 is fluidly coupled to the sump eductor 4108. During a flush event, fluid (e.g., water) is directed by the jet switching device 4106 to the oscillating edge jet system 4104 through a first fluid conduit 4117, the first fluid conduit 4117 fluidly connects the first outlet port 4114 to each of the jet oscillators 4118. Flow continues through the oscillating edge ejector system 4104 until sufficient back pressure is established in the first capacitor 4120. At this point, flow is redirected by the fluidic switching device through second fluid conduit 4122, which second fluid conduit 4122 fluidly connects second outlet port 4116 to sump sprayer 4108. The flow through sump eductor 4108 helps remove any large debris residue in the sump area at the end of the flush event. Once sufficient back pressure is established in the second fluid capacitor 4124, the jet switching device 4106 returns flow to the oscillating rim jet system 4104 to refill the toilet bowl 4109. It should be understood that in various exemplary embodiments, the timing, component location, and interconnection between components may be different.

Fig. 51 illustrates a urinal 600 according to an exemplary embodiment, the urinal 600 including a fluidic oscillator 602 configured to clean the interior surface of the urinal 600. Fluidic oscillator 602 can be the same as or similar to fan oscillator 502 of fig. 46 or fluidic oscillator 3900 of fig. 47-48. In other embodiments, the geometry of the fluidic oscillator may be different. As shown in fig. 51, a fluidic oscillator 602 is coupled to the upper wall of the urinal 600 and is configured to distribute water along the upper surface of the upper wall. The urinal 600 may be a tankless urinal that is directly connected to a water supply conduit at line pressure (e.g., line pressure, no reservoir, etc.). In other embodiments, the urinal 600 may include a flush tank (e.g., a reservoir, etc.) configured to provide a predetermined amount of water to the urinal 600 during flushing. According to the exemplary embodiment of fig. 51, the fluidic oscillator 602 is configured to provide water to the urinal 600 in a sweeping motion during a flush cycle. In other embodiments, the movement of fluidic oscillator 602 can help reduce splashing during urination. In other embodiments, the fluidic oscillator 602 may be configured to provide a chemical (e.g., a chemical cleaner) to the surface of the urinal 600. The chemical may reduce scale, stains, bacteria or odors within the urinal 600.

Referring to fig. 52-53, a urinal assembly 4200 is shown, the urinal assembly 4200 including a fluidic oscillator 4202 (e.g., fan oscillator 502) disposed at an intermediate location along an interior surface 4204 of a urinal 4206. As shown in fig. 53, fluidic oscillator 4202 may be housed within (or integrally formed as) a cylindrical extension 4208, the cylindrical extension 4208 protruding inward from inner surface 4204. In other embodiments, the shape and location of the extension 4208 may be different. In some embodiments, as shown in fig. 54, the extension 4300 may include more than one fluidic oscillator 4302 (e.g., two fluidic oscillators arranged in parallel, etc.). Among other benefits, the use of multiple fluidic oscillators 4302 (e.g., dual fluidic oscillators 4302 as shown in fig. 54) provides a wider fluid coverage across the interior surface 4204 of the urinal 600 and provides an interesting visual effect than the use of a single fluidic oscillator.

Fluidic oscillators

502, 602 can be used, for example, in a variety of different plumbing fixtures to facilitate cleaning of one or more surfaces of the plumbing fixture during periods of non-use. In the embodiment of fig. 55, a plurality of fluidic oscillators 602 are coupled to the inner wall of the whirlpool tub. The fluidic oscillators 602 are disposed along the upper ledge of the bathtub and are spaced at regular intervals along the perimeter of the whirlpool bathtub. In the embodiment of fig. 56, a plurality of fluidic oscillators 602 are spaced at regular intervals along a tiled shower wall. Fluidic oscillator 602 can also be used in small spaces due to its small size and low profile. For example, one or more fluidic oscillators 602 can be placed into the overflow or under the edge (e.g., ledge, etc.) of a self-cleaning sink to improve the distribution of flow to different areas of the sink.

According to an exemplary embodiment, the jet device is configured to generate a specific jet from a pulsating water flow. Fig. 57-59 show cross-sectional views of toilets (shown in fig. 57 as toilet 700, in fig. 58 as toilet 720, and in fig. 59 as toilet 740), each including a fluidic oscillator 702 configured to generate a pulsating flow at a sump sprayer 120 of the toilet. In the embodiment of fig. 57 and 59, sump sprayer 120 forms part of fluidic oscillator 702. The fluidic oscillator 702 is coupled to the toilet proximate the forward wall of the water collection tank 114. In the embodiment of fig. 58, fluidic oscillator 702 is disposed within inlet conduit 704 upstream of sump sprayer 120. As shown in fig. 57-59, fluidic oscillator 702 includes an inlet channel 706, a resonating chamber 708, and an outlet chamber 710. Fluidic oscillator 702 includes an outlet opening 712 disposed on an end of outlet chamber 710 (e.g., the rightmost end of outlet chamber 710 as shown in fig. 57). In the embodiment of fig. 57 and 59, the cross-sectional area of the outlet opening 712 is smaller than the cross-sectional area of the outlet chamber 710. According to the exemplary embodiment of fig. 58, the diameter of outlet opening 712 is smaller than the inner diameter of outlet chamber 710 at outlet opening 712. The geometry of the outlet chamber 710 shown in fig. 57 produces an annular jet in response to the pulsating flow through the outlet chamber 710.

Various alternative device geometries may be used to generate the pulsating water flow through the outlet chamber 710. Fig. 60 shows a fluidic oscillator 800 according to another exemplary embodiment, the fluidic oscillator 800 cyclic pulsation frequency being a function of the diameter of the upper resonance chamber 802. Fig. 61 shows an example of a fluidic oscillator 900 that utilizes a mechanical linkage to control the frequency of the pulsating flow. As shown in fig. 61, fluidic oscillator 900 includes a piston 902, a diaphragm 904 coupled to piston 902, and a spring 906 coupled to diaphragm 904. Water entering through the inlet of fluidic oscillator 900 flows around the piston and into the outlet chamber where diaphragm 904 is located. This flow pressurizes the outlet chamber, pressing against the diaphragm 904, compressing the spring 906, and moving the piston 902. Once sufficient chamber pressure is reached, the piston 902 prevents any additional flow from the inlet into the outlet chamber. When the outlet chamber is depressurized (e.g., due to flow exiting the outlet chamber), the spring 906 moves the diaphragm 904, which diaphragm 904 serves to return the piston 902 to its original position so that the process can be repeated.

Fig. 62-64 illustrate examples of special jets (shown as jet 1000 in fig. 62, jet 1003 in fig. 63, and jet 1005 in fig. 64) that may be formed using a single fluidic oscillator configured to generate a pulsating flow. The jets formed at each outlet of the fluidic oscillator interact with each other to form different flow structures. As shown in fig. 62-64, the position of the exit of the fluidic oscillator can be adjusted to create a new type of special jet.

Fig. 65-67 illustrate separate fluidic oscillators (shown as fluidic oscillator 1002 in fig. 65, 1004 in fig. 66, and 1006 in fig. 67) configured to generate different types of special jets (e.g., alternating sized annular jets, etc.), according to various exemplary embodiments. As shown in fig. 65-67, the fluidic oscillator is the same as or similar to the fluidic oscillator 402 described with reference to fig. 10. The size and configuration of the jet stream is controlled by varying the size of inner and outer outlet chambers (e.g., concentric outlet chambers, etc.), where each chamber is coupled to a different outlet channel of the fluidic oscillator.

The size of the annular jet stream and/or other flow structures produced by the fluidic oscillator (e.g., the fluidic oscillator of any of fig. 62-67, etc.) can be adjusted by changing the size of the outlet chamber (e.g., outlet chamber 710 of fig. 57-59). Among other benefits, for the same mass flux of water, the momentum (e.g., thrust) generated by a particular jet is greater than a continuous flow jet, and greater than a continuous flow stream. The special jet produced by the pulse flow also improves the removal of the bulk material, thus improving the cleaning capacity of the sanitary product. Due to the reduction in water consumption, special sprayers (e.g., sump sprayers, edge sprayers, etc.) may be created that reduce the overall noise level of the plumbing fixture, which advantageously improves the user experience. In addition, the special jet penetrates further into the fluid before dissipating, compared to a continuous flow jet.

Referring now to fig. 68, a toilet 1100 including a fluidic device 1102 according to an exemplary embodiment is shown, the fluidic device 1102 configured to control the direction of flow away from a sprayer surface. The fluidic device 1102 includes a plurality of synthetic jets 1104, the plurality of synthetic jets 1104 being arranged circumferentially around the jet surface such that the plurality of synthetic jets 1104 at least partially surround the central jet. The synthetic jet 1104 includes a small nozzle (e.g., flow opening, etc.) that redirects the water flow from the central jet when activated. FIG. 69 shows a fluidic device 1102 just prior to activation of the synthetic jet. Fig. 70 shows the fluidic device 1102 after activation of a synthetic jet disposed vertically above the central jet. As shown in fig. 70, the synthetic jets redirect the water flow from the central jet toward the synthetic jets (e.g., vertically upward as shown in fig. 70).

As shown in fig. 68, the fluidic device 1102 is disposed in the water collection tank 114 of the toilet below the water level of the water collection tank 114. The jet device 1102 is configured to direct a flow toward the waterline of the toilet to break surface tension and reduce splashing associated with an impinging water jet. This configuration may, among other benefits, reduce the noise generated by the user when urinating on the water surface. In some embodiments, the fluidic device 1102 is used as part of a bidet tray to provide dynamic and/or directional flow control. In other embodiments, the jet device 1102 functions as a jet oscillator to direct water to different portions of the toilet bowl 106 during cleaning operations. According to an exemplary embodiment, the fluidic device 1102 includes a fluidic oscillator that generates a pulsating flow through the central jet to further enhance cleaning performance and reduce water consumption.

Although the above fluid control circuits and fluidic devices are shown in the context of line pressure toilets (e.g., toilet 100 of fig. 1-2), it should be understood that these devices and methods may also be applied to gravity fed siphon toilets that include a flush tank or hybrid toilets in which a first of a plurality of ejectors is fed directly from a water supply line and a second of the plurality of ejectors is fed by water from the flush tank. These devices and methods are equally applicable to residential and commercial urinals.

Shower nozzle

According to an exemplary embodiment, the sanitary fixture comprises a shower head. Fig. 71 shows a single showerhead 1200 including a plurality of injectors 1202 according to an exemplary embodiment. As shown in fig. 71, showerhead 1200 includes a fluidic device that includes fluidic oscillator 1204 fluidly coupled to a plurality of sprayers 1202. The fluidic oscillator 1204 may be the same as or similar to the fluidic oscillator 702 described with reference to fig. 57-59 (e.g., a fluidic oscillator configured to produce a pulsating flow of water). In other embodiments, fluidic oscillator 1204 may be different. According to an exemplary embodiment, jet oscillator 1204 is coupled to a water supply line upstream of showerhead 1200 (e.g., embedded in a wall behind showerhead 1200 to improve the aesthetics of the shower). In other embodiments, fluidic oscillator 1204 is coupled directly to showerhead 1200. In some embodiments, showerhead 1200 is configured to activate and deactivate fluidic oscillator 1204, for example, by flowing water into or out of fluidic oscillator 1204 (e.g., through a straight section of pipe arranged in parallel with fluidic oscillator 1204, etc.).

As shown in fig. 71, fluidic oscillator 1204 is configured to provide pulsed water flow to each of the plurality of injectors 1202 simultaneously. Among other benefits, fluidic oscillator 1204 reduces the required flow to showerhead 1200 compared to a sprayer that provides a continuous flow of water. Pulsatile flow may provide a user with a feeling of excitement, or simulate continuous flow at high frequencies to improve the overall user experience. As with other fluidic devices described herein, fluidic oscillator 1204 does not include moving parts, which improves the reliability of showerhead 1200.

As shown in fig. 71, fluidic oscillator 1204 includes a resonating chamber 1206. The frequency of the pulsating flow through the plurality of injectors 1202 varies with the volume of the resonant chamber 1206. In some embodiments, showerhead 1200 includes a rod, latch, or other actuator configured to adjust the volume of resonant chamber 1206. For example, showerhead 1200 may include a rod coupled to a wall of resonant chamber 1206 on one side of showerhead 1200, or a switch configured to fluidly couple resonant chamber 1206 to different lengths of tubing. The user can adjust the position of the lever or press a switch to adjust the frequency of the water pulses to improve the comfort or cleaning performance of the user.

Referring now to fig. 72, a showerhead 1300 configured to generate alternating inward and outward flow according to an exemplary embodiment is shown. Showerhead 1300 includes a fluidic oscillator 1302 configured to periodically switch flow between two outlet channels of fluidic oscillator 1302. As shown in fig. 72, first outlet channel 1304 of fluidic oscillator 1302 is fluidly coupled to a plurality of first jets 1306 of showerhead 1300. The second outlet passage 1308 is coupled to a plurality of second injectors 1310. According to an exemplary embodiment, the second plurality of injectors 1310 circumferentially surrounds the first plurality of injectors 1306. In other embodiments, the arrangement of the

injectors

1306, 1310 may be different.

The application of the fluidic device may be extended to a shower system comprising a plurality of showers as shown in figures 73 to 74. As shown in fig. 73-74, flow through each outlet channel of fluidic oscillator 1302 may be directed to a different showerhead. As shown in fig. 74, the shower system 1400 includes a plurality of fluidic oscillators 1402 arranged in series with an upper-level fluidic oscillator 1404. The arrangement of the plurality of fluidic oscillators 1402 can be adjusted to provide different spray effects and/or improve the overall bathing experience. In some embodiments, fluidic oscillator 1404 and/or other fluidic devices can be formed as interchangeable plastic fluidic valve bodies (e.g., modular inserts, etc.) that provide modularity to the shower system. For example, a plastic jet valve body can be swapped out or rearranged within the fluid control circuit to produce a different spray configuration at the water injector.

Referring now to fig. 75, another embodiment of a showerhead 1500 including a circular multi-headed oscillator according to an exemplary embodiment is shown. The circular multi-head oscillator includes a plurality of fluidic oscillators 1502 arranged in a circular chain. A circular multi-head oscillator sets up various flow patterns at each outlet to provide a unique shower experience. As shown in fig. 75, fluidic oscillators 1502 are arranged parallel to each other downstream of the water supply line. The fluidic oscillator 1502 is configured to circumferentially switch the direction of flow through the injector during normal operation. The interaction between the fluidic oscillators 1502 creates a rotational effect. The effect or pattern produced by the circular multi-headed oscillator may be different for different numbers of fluidic oscillators 1502.

A plurality of fluidic devices may be coupled together to create a desired flow pattern for a user of the showerhead. Referring now to fig. 76, a showerhead 1600 utilizing a plurality of fluidic devices according to an exemplary embodiment is shown. Showerhead 1600 includes fluidic oscillator 1602, where fluidic oscillator 1602 includes an input channel 1604, a first outlet channel 1606, a second outlet channel 1608, and a resonating chamber 1610. Showerhead 1600 also includes a plurality of venturi tubes 1612 downstream of jet oscillator 1602. Venturi 1612 is disposed within showerhead 1600 just upstream of the injector surface of showerhead 1600. A first end (e.g., an upstream end) of each venturi 1612 is fluidly coupled to one of the outlet passages 1606, 1608 of the fluidic oscillator 1602. A second end of each venturi 1612 is fluidly coupled to a respective one of the plurality of jets of showerhead 1600.

In operation, the jet oscillator 1602 pulses water through each venturi 1612 of the showerhead. The venturi 1612 injects bubbles (e.g., pockets of air, etc.) into the flow stream during each pulse. Among other benefits, venturi 1612 reduces the total volume of water ejected from showerhead 1600 compared to a continuous flow device. At high frequencies, showerhead 1600 provides a feeling of continuous flow to the user, which may minimize user discomfort associated with lower flow rates of water from showerhead 1600. The audible noise generated by showerhead 1600 is reduced due to the reduced flow rate. In some embodiments, the frequency of the pulses may be adjusted to simulate a calm sound, thereby improving the overall user experience of the shower system. In addition, different arrangements of venturi 1612 and jet oscillator 1602 can be used to generate different spray patterns at showerhead 1600.

Bath tub

Referring now to FIG. 77, a bathtub 1700 is shown according to an exemplary embodiment. As shown in FIG. 77, bathtub 1700 is configured as a whirlpool bathtub that includes a plurality of jets 1702 along a sidewall of bathtub 1700. In other embodiments, bathtub 1700 may comprise a hot water bath or a whirlpool bathtub. Bathtub 1700 includes a plurality of fluidic oscillators 1704 fluidly coupled to a plurality of jets 1702. As shown in fig. 77, the plurality of fluidic oscillators 1704 includes an upper stage fluidic oscillator 1706 and two lower stage fluidic oscillators 1708. The inlet channel 1710 of each of the lower fluidic oscillators 1708 is coupled to a respective one of a plurality of outlet channels 1712 from the upper fluidic oscillator 1706. The outlet passages 1714 from the lower stage fluidic oscillators 1708 are each coupled to a respective one of the sprayers 1702 in the bath 1700.

The number of water pulses provided by each of the injectors 1702 may be dynamically controlled over time, for example, by varying the operating frequency of the upper stage fluidic oscillator 1706 and the lower stage fluidic oscillator 1708. The number, type and arrangement of

fluidic oscillators

1706, 1708 and sprayers 1702 can be adjusted according to user preference to improve the overall bathing experience. For example, the upper stage fluidic oscillator 1706 may be configured to operate at a lower frequency than the lower stage fluidic oscillator 1708, resulting in periodic switching of flow between pairs of ejectors (first pair of ejectors 1716 and second pair of ejectors 1718 on either side of the user).

In some embodiments, bathtub 1700 includes a fluidic oscillator configured to generate a particular jet (e.g., a ring jet, etc.). The fluidic oscillator may be the same as or similar to the fluidic oscillator 702 described with reference to fig. 57-59. The particular jets improve the penetration of the flow into the bath relative to jets that produce a continuous flow of water, which advantageously improves the user experience.

Referring now to FIG. 78, a bathtub 1800 is shown according to an exemplary embodiment. Bathtub 1800 includes a jet 1802 configured to create micro-bubbles in the bathtub filling. As shown in fig. 78, bathtub 1800 includes a porous material 1804 disposed along a lower wall of bathtub 1800. The porous material 1804 may include a metal mesh, a porous ceramic or graphite, or any other suitable material. The pore size of the porous material 1804 can be about 40 microns, but can also vary depending on the desired microbubble size. In other embodiments, the placement of the porous material 1804 within the bathtub 1800 can be different (e.g., along a sidewall of the bathtub 1800, etc.). Fluidic device 1802 includes a fluidic oscillator 1806, and fluidic oscillator 1806 may be, for example, a compressed air powered bistable fluidic oscillator. As shown in fig. 78, the fluidic oscillator 1806 includes an inlet passage 1808 and an outlet passage 1810. The inlet passage 1806 is fluidly coupled to the ambient environment (e.g., the atmosphere surrounding the bathtub). Outlet channel 1810 is fluidly coupled to porous material 1804. The fluidic oscillator 1806 provides a source of pulsating air flow to the porous material 1804, causing small bubbles or air pockets to form and separate from the surface of the porous material 1804. Among other benefits, fluidic device 1802 operates with less noise than a suction vortex ejector.

Fig. 79-82 illustrate the process of forming bubbles from a single hole 1812 of the porous material 1804. As shown in fig. 82, the diameter of the bubbles generated by fluidic device 1802 is approximately the same as the diameter of holes 1812. According to an exemplary embodiment, the size of the apertures 1812 is approximately equal to 50 μm or less. Among other benefits, smaller bubbles will remain suspended in the bathtub filling for longer periods of time relative to large bubbles. Micro-bubbles also provide enhanced cleaning capabilities relative to large bubbles. In addition, the micro-bubbles provide a unique feel (e.g., tickling, etc.) to the user of the tub, which improves the overall user experience. The micro-bubbles do not grow or coalesce, which advantageously reduces the tendency of the bubbles to cool and evaporate as they approach the upper surface of the water in the bathtub 1800. According to an exemplary embodiment, fluidic device 1802 is configured to generate billions of bubbles per second at various sizes depending on the distribution of pore sizes in porous material 1804, the supply air pressure to the fluidic device, and the geometry of the fluidic device. Fig. 83-84 illustrate possible flow fields (bubble size 1850 in fig. 83 and bubble size 1852 in fig. 83) that may be achieved by generating micro-bubbles within a bathtub according to various exemplary embodiments.

The number, type, and arrangement of components used in the fluidic device 1802 of fig. 78 should not be considered limiting. For example, each outlet channel may be fluidly coupled to a different portion (e.g., section, portion, etc.) of the porous material 1804, or to separate pieces of porous material located in different portions of the bathtub 1800. As with other embodiments described herein, the fluidic device 1802 can also include a lever, latch, switch, or another form of actuator configured to change the operating frequency of the fluidic oscillator to provide the user with the ability to customize the bathing experience.

Water tap

Referring now to fig. 85, a faucet 1900 is shown according to an exemplary embodiment. Faucet 1900 may be a kitchen or bathroom faucet, or a permanent fixture in another room of a building. In some embodiments, faucet 1900 is coupled to a countertop. The faucet 1900 includes a water inlet 1902, the water inlet 1902 being configured to receive water from a water supply conduit. The water supply conduit may be a water supply line within a home, a commercial property, or another type of building. The water supply conduit may be configured to supply water to the faucet 1900 at tap or well pump pressure. The water supply conduit may be a pipe, tube or other water delivery mechanism. As shown in fig. 85, the faucet 1900 includes a retractable faucet 1904.

As shown in fig. 85, the faucet 1900 includes a plurality of sprayers 1906 disposed at the discharge end of a retractable faucet 1904. The faucet 1900 also includes a fluidic oscillator 1908. According to an exemplary embodiment, fluidic oscillator 1908 is a monostable fluidic oscillator 1908 configured to supply a pulsating flow of water to each of injectors 1906. The inlet channel of the fluidic oscillator 1908 is fluidly coupled to a water supply conduit. The outlet channel of fluidic oscillator 1908 is fluidly coupled to the inlet of faucet body 1901. In some embodiments, the faucet 1900 also includes a lever, catch, switch, or another form of actuator configured to adjust the operating frequency of the fluidic oscillator 1908 (e.g., by adjusting the volume of the resonant chamber of the fluidic oscillator 1908, etc.). The flow pulses generated by jet oscillator 1908 can be used as water hammers to improve removal of adhered soil and contaminants from the surface of the dishes, among other benefits. Furthermore, fluidic oscillator 1908 can be tuned to introduce small bubbles (e.g., micro-or nano-bubbles) into the spray, which can advantageously improve the cleaning capabilities of faucet 1900.

In some embodiments, monostable fluidic oscillator 1908 is replaced with a fan oscillator similar to fan oscillator 502 described with reference to fig. 46. In other embodiments, the fluidic oscillator comprises a bistable fluidic oscillator.

Fig. 86-87 illustrate a faucet 2000 including a plurality of bi-stable fluidic oscillators 2002 according to an exemplary embodiment. Each bistable fluidic oscillator 2002 comprises a generally rectangular plate on which the channels of the bistable fluidic oscillator 2002 are formed. The bistable fluidic oscillators 2002 are arranged parallel to each other to reduce the pressure drop across the faucet 2000. In some embodiments, the faucet 2000 may be configured to activate different sets of fluidic oscillators 2002 in response to various control commands (e.g., manual manipulation of a lever, switch, or other form of actuator).

Fig. 88-90 illustrate a nozzle insert 2100 for a faucet according to an exemplary embodiment. The insert 2100 is configured to engage with (e.g., insert into, couple to, etc.) an outlet of a faucet. In some embodiments, the nozzle insert 2100 is a retrofit nozzle configured to be removably coupled to an existing faucet body. As shown in fig. 88-90, the insert 2100 includes an inner portion 2102 and an outer portion 2104. As shown in fig. 89, the inner portion 2102 is housed within a chamber defined by the outer portion 2104 such that the outer portion 2104 surrounds the inner portion 2102. As shown in fig. 89, both the inner portion 2102 and the outer portion 2104 are shaped as concentric cylinders. In other embodiments, the shape and arrangement of the inner portion 2102 and the outer portion 2104 can be different.

According to an exemplary embodiment, both the inner portion 2102 and the outer portion 2104 include a plurality of channels 2106, the plurality of channels 2106 being machined or otherwise formed on mating surfaces of the inner portion 2102 and the outer portion 2104 (e.g., an outer surface of the inner portion 2102 and an inner surface of the outer portion 2104). The plurality of channels 2106 on the inner portion 2102 and the outer portion 2104 together form a plurality of bi-stable fluidic oscillators.

Fig. 90 shows the direction of flow through the nozzle insert 2100. The flow received at the first end of the insert (e.g., the lower end of the insert as shown in fig. 90) enters into the distribution chamber. Flow is redirected from the dispensing chamber through an aperture in the inner portion 2102 and into a channel occupying an annular area between the inner portion 2102 and the outer portion 2104. As shown in fig. 90, the flow moves substantially axially through the channel of the fluidic oscillator (e.g., upward as shown in fig. 90, parallel to the axis of the insert 2100, etc.), which causes the flow to rapidly switch between multiple jets (e.g., outlet openings, etc.).

The geometry of the channels may be modified to achieve different spray patterns and flows at the outlet of the insert 2100. For example, the insert 2100 may be modified to include multiple venturi tubes along each outlet passage of the pulsating jet device to reduce water consumption and/or increase the cleaning capability of the faucet. Fig. 91-92 show a fluidic oscillator 2200 comprising a venturi 2202 arranged just upstream of the ejector.

Pumping device

Fig. 93 illustrates a pumping device 2300, according to an exemplary embodiment. The pumping device 2300 is configured to produce a pulsating jet of water. The pumping device 2300 includes a jet drive 2302 and a rectifier 2304 coupled to the jet drive 2302. The jet drive 2302 is configured to reposition and/or vibrate the flow straightener 2304. Fluidic driver 2302 comprises a plurality of piezoelectric elements. As shown in fig. 6, each of the piezoelectric elements 2306 includes a piezoelectric actuator 2308 (e.g., a piezoceramic disc), the piezoelectric actuator 2308 being configured to convert an electrical signal into a physical displacement. Among other benefits, the piezoelectric element 2306 can actuate at very high frequencies compared to other actuators such as solenoids. Fig. 95 and 96 compare the total displacement that can be achieved by a single piezoelectric element 2306 (fig. 95) and a plurality of piezoelectric elements 2306 (fig. 96) stacked on top of each other. As shown in fig. 96, the total displacement 2310 of the plurality of piezoelectric elements 2306 is approximately equal to the sum of the displacements 2312 (see fig. 95) of each individual piezoelectric element. The fluidic driver 2302 additionally includes a housing 2316, the housing 2316 configured to receive the piezoelectric element 2306 therein. As shown in fig. 93, the piezoelectric element 2306 is coupled to the current straightener 2304 by a connecting member 2314 (e.g., a cylindrical rod, post, etc.).

Fig. 97-98 show side views of the pumping device 2300 in operation. Both the jet drive 2302 and the flow straightener 2304 are disposed within the hollow sleeve 2318 in a coaxial arrangement with the hollow sleeve 2318. As shown in fig. 97, fluid flows around the housing 2316, flowing through the annular space between the housing 2316 and the hollow sleeve 2318. The movement of the flow straightener 2304 draws fluid toward an opening 2320 (e.g., nozzle, through-hole, etc.) disposed in an end of the hollow sleeve 2318. The movement of the flow straightener 2304 produces a pulsating jet of fluid 2322 ejected from the opening 2320. As shown in fig. 97, when the flow straightener 2304 is pulled back towards the jet drive 2302, fluid is allowed to pass freely (e.g., through the flow straightener 2304 under low pressure drop with little restriction) through the internal passage 2324 in the body 2326 of the flow straightener 2304. As shown in fig. 98, the geometry of the passageway 2324 prevents fluid from returning through the flow straightener 2304 (e.g., returning toward the jet drive 2302) as the flow straightener 2304 moves away from the jet drive 2302 toward the opening 2320. The reciprocating, back and forth motion of the flow straightener 2304 pumps the fluid out through the opening 2320, creating a pulsating jet of fluid.

Referring to fig. 99, a cross-sectional view through a pumping device 2400 similar to pumping device 2300 is shown, according to an exemplary embodiment. The pumping device 2400 includes a fluidic driver 2402 and a flow straightener 2404. The fluidic driver 2402 includes a plurality of extensions 2425 that extend outwardly from a housing 2416 of the fluidic driver 2402 (e.g., extend radially outwardly relative to a central axis of the housing 2416) in a substantially perpendicular orientation relative to an outer surface of the housing 2416. In the embodiment of fig. 99, extension 2425 is a thin rectangular plate. In other embodiments, extension 2425 can be a thin rod, post, or any other suitable structure. An extension 2425 couples the housing 2416 to an inner surface 2428 of a hollow sleeve 2418 of the jet drive 2402 and supports the housing 2416 in a coaxial arrangement with the hollow sleeve 2418. As shown in fig. 100, extension 2425 is sized and shaped to reduce losses and allow water to pass through annular space 2430 between housing 2416 and hollow sleeve 2418 with little obstruction.

As shown in fig. 99, the flow straightener 2404 includes a plurality of internal passages 2424 formed into a body 2426 of the flow straightener 2404. Internal passageway 2424 is shaped to minimize flow losses (e.g., pressure drop, etc.) in the direction of flow through pumping device 2400 (e.g., from the jet drive toward opening 2420). The internal passage 2424 includes a generally "U" -shaped lateral branch 2432, the lateral branch 2432 capturing and entraining fluid flowing back through the flow straightener 2404 (e.g., flowing from an opening 2420 in the hollow sleeve 2418 toward the jet drive 2402). Fig. 101 to 102 show the pumping device 2400 in operation. As shown in fig. 101, when the jet drive 2402 retracts the flow straightener 2404 away from the opening 2420, fluid is allowed to pass through the internal passage 2424 with little pressure drop through the flow straightener 2404. As shown in fig. 102, when the jet drive 2402 is extended to force the flow straightener 2404 towards the opening 2420, water is prevented from flowing back through the flow straightener 2404 due to the back pressure created by the lateral branch 2432. Thus, flow straightener 2404 is sized and shaped to act as a piston, forcing fluid out through opening 2420 when moving toward opening 2420. During operation, fluid (e.g., water) continuously moves through the hollow sleeve 2418 to reduce cavitation in the flow straightener 2404.

Fig. 103A-103D illustrate some of the various flow configurations that may be produced by pumping device 2400. Pumping device 2400 generates a pulsed jet stream that is substantially conical in shape. The flow configuration created by pumping device 2400 (e.g., fluidic driver 2402) can be varied by adjusting the frequency of pumping device 2400.

Various exemplary embodiments of sanitary fixtures are disclosed herein that provide several advantages over continuous flow devices. The plumbing fixture includes one or more fluidic devices configured to control water flow through one or more sprayers of the plumbing fixture. The fluidic device can be configured to provide pulsating flow, oscillating flow, or a combination thereof to reduce water consumption and noise while maximizing the cleaning capabilities of the plumbing fixture. Fluidic devices can be interconnected to produce a variety of different spray patterns and flow configurations. In some embodiments, fluidic devices may be combined into a fluid logic control loop to coordinate the timing and activation of the ejectors for the plumbing fixture, thereby eliminating the need for complex and expensive electronic valves.

As used herein, the terms "about," "substantially," and the like are intended to have a broad meaning consistent with the ordinary and recognized usage of those of ordinary skill in the art to which the subject matter of this disclosure pertains. Those skilled in the art who review this disclosure will appreciate that these terms are intended to allow description of certain features described and claimed without limiting the scope of these features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alternatives to the subject matter described and claimed are considered to be within the scope of the application as recited in the appended claims.

It should be noted that the term "exemplary" as used herein to describe various embodiments is intended to indicate that such embodiments are possible examples, representations, and/or illustrations of possible embodiments (and that the term is not intended to imply that such embodiments are necessarily uncommon or the best examples).

The terms "coupled," "connected," and the like as used herein mean that two members are directly or indirectly joined to each other. Such engagement may be fixed (e.g., permanent) or movable (e.g., removable or releasable). Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another.

References herein to the position of elements (e.g., "top," "bottom," "above," "below," etc.) are used merely to describe the orientation of the various elements in the drawings. It should be noted that the orientation of the various elements may differ according to other exemplary embodiments, and such variations are intended to be encompassed by the present disclosure.

It is important to note that the construction and arrangement of the devices and control systems as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited herein. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments.

Other substitutions, modifications, changes and omissions may also be made in the design, operating conditions and arrangement of the various exemplary embodiments without departing from the scope of the present application. For example, any element disclosed in one embodiment may be combined with or used together with any other embodiment disclosed herein.

Claims

1. A toilet assembly, comprising:

a toilet body defining a toilet bowl configured to receive a volume of fluid therein; and

a fluidic oscillator coupled to the toilet body in an edge region of the toilet bowl, the fluidic oscillator positioned to direct fluid onto an interior surface of the toilet bowl, the fluidic oscillator configured to continuously redirect a flow of fluid to different locations along the interior surface.

2. The toilet assembly of claim 1, wherein the outlet port of the fluidic oscillator is positioned to sweep fluid exiting the fluidic oscillator in a generally circumferential direction along the perimeter of the toilet bowl.

3. The toilet assembly according to claim 1, wherein the fluidic oscillator is one of a plurality of fluidic oscillators equally spaced along the perimeter of the toilet bowl.

4. The toilet assembly of claim 1, wherein the toilet body further comprises a rim channel extending radially inward from an outer periphery of the toilet bowl at an upper end of the toilet bowl, and wherein the jet oscillator is at least partially disposed within the rim channel.

5. The toilet assembly according to claim 4, wherein the rim channel includes a horizontal portion extending radially inward from the outer periphery and a vertical portion extending downward from the horizontal portion in a generally vertical orientation relative to the horizontal portion, and wherein the vertical portion is radially spaced from the inner surface by the horizontal portion.

6. The toilet assembly according to claim 1, wherein the fluidic oscillator is one of a plurality of fluidic oscillators fluidly connected to each other in an annular arrangement.

7. The toilet assembly of claim 6, wherein the fluidic oscillator is positioned to cover the interior surface of the toilet bowl with fluid along an entire perimeter of the toilet bowl in at least one vertical position between a sump of the toilet bowl and the rim area.

8. The toilet assembly of claim 1, wherein the fluidic oscillator comprises an inlet port, an outlet port, a plenum, and a recessed region, wherein the plenum fluidly connects the inlet port and the outlet port, and wherein the recessed region is disposed within the plenum and extends between opposing sidewalls of the plenum.

9. The toilet assembly according to claim 1, further comprising a jet switching device and a sump sprayer, wherein the jet switching device is fluidly connected to the jet oscillator and the sump sprayer, and wherein the jet switching device is configured to automatically switch flow between the jet oscillator and the sump sprayer after a predetermined period of time.

10. A toilet assembly, comprising:

a plurality of fluidic oscillators positioned to direct fluid onto an interior surface of the toilet bowl, the fluidic oscillators fluidly connected to each other in an annular arrangement extending along a perimeter of the toilet bowl.

11. The toilet assembly of claim 10, wherein each of the plurality of fluidic oscillators is configured to continuously redirect a fluid flow to different locations along the interior surface.

12. The toilet assembly of claim 10, wherein an outlet port of at least one of the fluidic oscillators is positioned to sweep fluid exiting the outlet port in a generally circumferential direction along the perimeter of the toilet bowl.

13. The toilet assembly according to claim 10, wherein the fluidic oscillators are equally spaced along the perimeter of the toilet bowl.

14. The toilet assembly of claim 10, wherein the toilet body further comprises a rim channel extending radially inward from an outer periphery of the toilet bowl at an upper end of the toilet bowl, and wherein the jet oscillator is at least partially disposed within the rim channel.

15. The toilet assembly according to claim 14, wherein the rim channel includes a horizontal portion extending radially inward from the outer periphery and a vertical portion extending downward from the horizontal portion in a generally vertical orientation relative to the horizontal portion, and wherein the vertical portion is radially spaced from the interior surface by the horizontal portion.

16. An irrigation system comprising:

a plurality of fluidic oscillators fluidly connected together in a ring arrangement, the plurality of fluidic oscillators configured to be positioned within an edge region of a toilet bowl and configured to continuously redirect fluid flow to different locations along an interior surface of the toilet bowl.

17. The irrigation system of claim 16, wherein an outlet port of at least one of the fluidic oscillators is positioned to sweep fluid in a substantially circumferential direction along a perimeter of the annular arrangement.

18. The irrigation system of claim 16, wherein the fluidic oscillators are equally spaced along the length of the annular arrangement.

19. The irrigation system of claim 16, wherein each fluidic oscillator of the plurality of fluidic oscillators comprises an inlet port, an outlet port, a plenum chamber, and a recessed region, wherein the plenum chamber fluidly connects the inlet port and the outlet port, and wherein the recessed region is disposed within the plenum chamber and extends between opposing sidewalls of the plenum chamber.

20. The irrigation system of claim 16, further comprising a fluidic switching device and a sump sprayer, wherein the fluidic switching device is fluidly connected to the fluidic oscillator and the sump sprayer, and wherein the fluidic switching device is configured to automatically switch flow between the fluidic oscillator and the sump sprayer after a predetermined period of time.